Yemen's government nearly saw itself pushed into the sea by advancing rebels here three years ago. Now the port city of Aden shows the challenges that will likely still plague the nation following any potential peace agreement.

Bursts of heavy machine gun fire still punctuates the nights in Aden, now marked with war-shattered buildings and questions over what an end to its war might mean for a region where secessionist flags appear to fly everywhere.

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In this Wednesday, Dec. 12, 2018 photo, a soldier allied to Yemen's internationally recognized government waves the South Yemen flag at the port of Aden in Aden, Yemen. A sense of normalcy has returned to Aden, now the seat of power for Yemen's internationally recognized government, but many challenges remain for bringing a lasting peace to the Arab world's poorest country. Since Yemen's war broke out, secessionists wanting South Yemen to again break away have increasingly been flying the flag as a symbol of their aspiration. (AP PhotoJon Gambrell)

Yemen's government nearly saw itself pushed into the sea by advancing rebels here three years ago. Now the port city of Aden shows the challenges that will likely still plague the nation following any potential peace agreement.

In this Wednesday, Dec. 12, 2018 photograph, soldiers allied to Yemen's internationally recognized government stand guard at the port of Aden in Aden, Yemen. A sense of normalcy has returned to Aden, now the seat of power for Yemen's internationally recognized government, but many challenges remain for bringing a lasting peace to the Arab world's poorest country. (AP PhotoJon Gambrell)

"The road ahead is extremely difficult," said Adam Baron, a Yemen analyst at the European Council on Foreign Relations and the Washington-based think tank New America. "Security issues remain extremely perilous in the city of Aden, the economy remains in deep trouble and the currency continues to fluctuate."

In this Wednesday, Dec. 12, 2018 photo, soldiers allied to Yemen's internationally recognized government fly the South Yemen flag at the port of Aden in Aden, Yemen. A sense of normalcy has returned to Aden, now the seat of power for Yemen's internationally recognized government, but many challenges remain for bringing a lasting peace to the Arab world's poorest country. Since Yemen's war broke out, secessionists wanting South Yemen to again break away have increasingly been flying the flag as a symbol of their aspiration. (AP PhotoJon Gambrell)

The Houthis, members of a Shiite sect, pushed government forces south and almost entirely out of Aden before Saudi and Emirati forces backed by other nations like the U.S. launched a war against them in March 2015.

In this Wednesday, Dec. 12, 2018 photo, a soldier allied to Yemen's internationally recognized government stands guard at the port of Aden in Aden, Yemen. A sense of normalcy has returned to Aden, now the seat of power for Yemen's internationally recognized government, but many challenges remain for bringing a lasting peace to the Arab world's poorest country. (AP PhotoJon Gambrell)

On the surface, life appears to be humming on in Aden. Fishermen secure their catches in the sun-soaked waters of the Gulf of Aden. Cashiers thump through giant wads of cash at the Central Bank.

In this Wednesday, Dec. 12, 2018 photo, a Saudi soldier takes a photograph of himself with a young Yemeni boy in traditional dress at a ceremony at the port of Aden in Aden, Yemen. A sense of normalcy has returned to Aden, now the seat of power for Yemen's internationally recognized government, but many challenges remain for bringing a lasting peace to the Arab world's poorest country. (AP PhotoJon Gambrell)

Saudi Arabia has deposited billions into Yemen's Central Bank to support the country. Officials hope another $3 billion soon will come from Kuwait and the UAE, said Shokeib Hobeishy, the deputy head of Central Bank.

In this Wednesday, Dec. 12, 2018 photo, a Yemeni woman takes a picture of another at the port of Aden in Aden, Yemen. A sense of normalcy has returned to Aden, now the seat of power for Yemen's internationally recognized government, but many challenges remain for bringing a lasting peace to the Arab world's poorest country. (AP PhotoJon Gambrell)

Yet Western fatigue with the Saudi-led war is growing. The killing and dismemberment of Washington Post journalist Jamal Khashoggi at the kingdom's consulate in Istanbul, allegedly by members of Crown Prince Mohammed bin Salman's royal entourage, has fueled the anger of U.S. lawmakers. Already, the U.S. refueling of Saudi warplanes has stopped after months of indiscriminate airstrikes on hospitals and markets, killing civilians.

In this Wednesday, Dec. 12, 2018 photo, Maeen Abdulmalik Saeed, the prime minister of Yemen's internationally recognized government that the Saudi-led coalition backs, sits for an interview with foreign journalists in Aden, Yemen. A sense of normalcy has returned to Aden, now the seat of power for Yemen's internationally recognized government, but many challenges remain for bringing a lasting peace to the Arab world's poorest country. (AP PhotoJon Gambrell)

Peace talks over ending the war wrapped up Thursday in Rimbo, Sweden, with the warring sides agreeing to a cease-fire in the strategic port city of Hodeida, where fighting has disrupted vital aid deliveries for the entire country, and a withdrawal of combatants from the city's front lines. The agreement is considered an important first step toward further talks in January aimed at drawing down the stalemated conflict.

In this Wednesday, Dec. 12, 2018 photo, Maeen Abdulmalik Saeed, the prime minister of Yemen's internationally recognized government that the Saudi-led coalition backs, is interviewed by foreign journalists in Aden, Yemen. A sense of normalcy has returned to Aden, now the seat of power for Yemen's internationally recognized government, but many challenges remain for bringing a lasting peace to the Arab world's poorest country. (AP PhotoJon Gambrell)

Follow Jon Gambrell on Twitter at www.twitter.com/jongambrellap . Follow Malak Harb at www.twitter.com/malakharb .

In this Wednesday, Dec. 12, 2018 photo, Maeen Abdulmalik Saeed, the prime minister of Yemen's internationally recognized government that the Saudi-led coalition backs, is interviewed by foreign journalists in Aden, Yemen. A sense of normalcy has returned to Aden, now the seat of power for Yemen's internationally recognized government, but many challenges remain for bringing a lasting peace to the Arab world's poorest country. (AP PhotoJon Gambrell)

In this Wednesday, Dec. 12, 2018 photo, Maeen Abdulmalik Saeed, the prime minister of Yemen's internationally recognized government that the Saudi-led coalition backs, is interviewed by foreign journalists in Aden, Yemen. A sense of normalcy has returned to Aden, now the seat of power for Yemen's internationally recognized government, but many challenges remain for bringing a lasting peace to the Arab world's poorest country. (AP PhotoJon Gambrell)

Shokeib Hobeishy, the deputy head of the Central Bank of Yemen's internationally recognized government, gestures while speaking to foreign journalists in Aden, Yemen, Thursday, Dec. 13, 2018. A sense of normalcy has returned to Aden, now the seat of power for Yemen's internationally recognized government, but many challenges remain for bringing a lasting peace to the Arab world's poorest country. (AP PhotoJon Gambrell)

Shokeib Hobeishy, the deputy head of the Central Bank of Yemen's internationally recognized government, gestures while speaking to foreign journalists in Aden, Yemen, Thursday, Dec. 13, 2018. A sense of normalcy has returned to Aden, now the seat of power for Yemen's internationally recognized government, but many challenges remain for bringing a lasting peace to the Arab world's poorest country. (AP PhotoJon Gambrell)

Customers are reflected in a window as a cashier works at the Central Bank of Yemen's internationally recognized government in Aden, Yemen, Thursday, Dec. 13, 2018. A sense of normalcy has returned to Aden, now the seat of power for Yemen's internationally recognized government, but many challenges remain for bringing a lasting peace to the Arab world's poorest country. (AP PhotoJon Gambrell)

Customers are reflected in a window as a cashier works at the Central Bank of Yemen's internationally recognized government in Aden, Yemen, Thursday, Dec. 13, 2018. A sense of normalcy has returned to Aden, now the seat of power for Yemen's internationally recognized government, but many challenges remain for bringing a lasting peace to the Arab world's poorest country. (AP PhotoJon Gambrell)

As a round of peace talks in Sweden ended Thursday between the government and Houthi rebels, foreign journalists on a tour organized by the Saudi-led military coalition saw a city needing huge sums of money and aid. A Central Bank official spoke of a hoped-for infusion of $3 billion by Kuwait and the United Arab Emirates, underscoring the long road ahead for the Arab world's poorest country as U.S. lawmakers grow increasingly uneasy about America's role in the conflict.

In this Wednesday, Dec. 12, 2018 photo, a soldier allied to Yemen's internationally recognized government waves the South Yemen flag at the port of Aden in Aden, Yemen. A sense of normalcy has returned to Aden, now the seat of power for Yemen's internationally recognized government, but many challenges remain for bringing a lasting peace to the Arab world's poorest country. Since Yemen's war broke out, secessionists wanting South Yemen to again break away have increasingly been flying the flag as a symbol of their aspiration. (AP PhotoJon Gambrell)

In this Wednesday, Dec. 12, 2018 photo, a soldier allied to Yemen's internationally recognized government waves the South Yemen flag at the port of Aden in Aden, Yemen. A sense of normalcy has returned to Aden, now the seat of power for Yemen's internationally recognized government, but many challenges remain for bringing a lasting peace to the Arab world's poorest country. Since Yemen's war broke out, secessionists wanting South Yemen to again break away have increasingly been flying the flag as a symbol of their aspiration. (AP PhotoJon Gambrell)

"The road ahead is extremely difficult," said Adam Baron, a Yemen analyst at the European Council on Foreign Relations and the Washington-based think tank New America. "Security issues remain extremely perilous in the city of Aden, the economy remains in deep trouble and the currency continues to fluctuate."

Yemen, the southern undercarriage of the Arabian Peninsula also home to oil-rich Saudi Arabia and the Dubai skyscrapers of the United Arab Emirates, was torn by decades of warfare prior to this current conflict.

Rebels known as Houthis stormed into the capital, Sanaa, in September 2014 and later seized power from the country's internationally recognized government.

In this Wednesday, Dec. 12, 2018 photograph, soldiers allied to Yemen's internationally recognized government stand guard at the port of Aden in Aden, Yemen. A sense of normalcy has returned to Aden, now the seat of power for Yemen's internationally recognized government, but many challenges remain for bringing a lasting peace to the Arab world's poorest country. (AP PhotoJon Gambrell)

In this Wednesday, Dec. 12, 2018 photograph, soldiers allied to Yemen's internationally recognized government stand guard at the port of Aden in Aden, Yemen. A sense of normalcy has returned to Aden, now the seat of power for Yemen's internationally recognized government, but many challenges remain for bringing a lasting peace to the Arab world's poorest country. (AP PhotoJon Gambrell)

The Houthis, members of a Shiite sect, pushed government forces south and almost entirely out of Aden before Saudi and Emirati forces backed by other nations like the U.S. launched a war against them in March 2015.

The Houthis, an armed group of followers of the Zaidi sect of Shiite Islam, still hold Sanaa and surrounding areas in Yemen's north.

More than 60,000 people have been killed since 2016, according to the U.S.-based Armed Conflict Location & Event Data Project, or ACLED, which tracks Yemen's war. The fighting has also displaced 2 million others, spawned a cholera epidemic and pushed the country to the brink of famine as emaciated children die of malnutrition. Millions wake up hungry each day, not knowing where their next meal will come from.

In this Wednesday, Dec. 12, 2018 photo, soldiers allied to Yemen's internationally recognized government fly the South Yemen flag at the port of Aden in Aden, Yemen. A sense of normalcy has returned to Aden, now the seat of power for Yemen's internationally recognized government, but many challenges remain for bringing a lasting peace to the Arab world's poorest country. Since Yemen's war broke out, secessionists wanting South Yemen to again break away have increasingly been flying the flag as a symbol of their aspiration. (AP PhotoJon Gambrell)

In this Wednesday, Dec. 12, 2018 photo, soldiers allied to Yemen's internationally recognized government fly the South Yemen flag at the port of Aden in Aden, Yemen. A sense of normalcy has returned to Aden, now the seat of power for Yemen's internationally recognized government, but many challenges remain for bringing a lasting peace to the Arab world's poorest country. Since Yemen's war broke out, secessionists wanting South Yemen to again break away have increasingly been flying the flag as a symbol of their aspiration. (AP PhotoJon Gambrell)

On the surface, life appears to be humming on in Aden. Fishermen secure their catches in the sun-soaked waters of the Gulf of Aden. Cashiers thump through giant wads of cash at the Central Bank. 

But Yemen's currency, though making recent gains, has heavily depreciated in the war. Government salaries, a major economic driver, dried up for those in Houthi-controlled areas.

"We need international support in the upcoming year to fill the gap and allow us to pay salaries to Yemeni citizens," said Maeen Abdulmalik Saeed, the prime minister of Yemen's internationally recognized government. "Supporting Yemen's economy will largely impact the humanitarian situation in Yemen."

In this Wednesday, Dec. 12, 2018 photo, a soldier allied to Yemen's internationally recognized government stands guard at the port of Aden in Aden, Yemen. A sense of normalcy has returned to Aden, now the seat of power for Yemen's internationally recognized government, but many challenges remain for bringing a lasting peace to the Arab world's poorest country. (AP PhotoJon Gambrell)

In this Wednesday, Dec. 12, 2018 photo, a soldier allied to Yemen's internationally recognized government stands guard at the port of Aden in Aden, Yemen. A sense of normalcy has returned to Aden, now the seat of power for Yemen's internationally recognized government, but many challenges remain for bringing a lasting peace to the Arab world's poorest country. (AP PhotoJon Gambrell)

Saudi Arabia has deposited billions into Yemen's Central Bank to support the country. Officials hope another $3 billion soon will come from Kuwait and the UAE, said Shokeib Hobeishy, the deputy head of Central Bank.

He also said he hoped the country would be able to once again export oil for international sales.

"Oil exports used to amount to 76 percent of the country's income," Hobeishy said. "This is one of the main reasons that we stress the importance of resuming Yemen's capability to export oil."

In this Wednesday, Dec. 12, 2018 photo, a Saudi soldier takes a photograph of himself with a young Yemeni boy in traditional dress at a ceremony at the port of Aden in Aden, Yemen. A sense of normalcy has returned to Aden, now the seat of power for Yemen's internationally recognized government, but many challenges remain for bringing a lasting peace to the Arab world's poorest country. (AP PhotoJon Gambrell)

In this Wednesday, Dec. 12, 2018 photo, a Saudi soldier takes a photograph of himself with a young Yemeni boy in traditional dress at a ceremony at the port of Aden in Aden, Yemen. A sense of normalcy has returned to Aden, now the seat of power for Yemen's internationally recognized government, but many challenges remain for bringing a lasting peace to the Arab world's poorest country. (AP PhotoJon Gambrell)

Yet Western fatigue with the Saudi-led war is growing. The killing and dismemberment of Washington Post journalist Jamal Khashoggi at the kingdom's consulate in Istanbul, allegedly by members of Crown Prince Mohammed bin Salman's royal entourage, has fueled the anger of U.S. lawmakers. Already, the U.S. refueling of Saudi warplanes has stopped after months of indiscriminate airstrikes on hospitals and markets, killing civilians.

Saeed, Yemen's prime minister, invoked the regional threat from Iran as a reason America needed to remain involved in the conflict, something earlier echoed on a trip last month to Yemen by U.S. Ambassador Matthew Tueller. United Nations experts, Western nations and analysts say Iran supplies the Houthis with weapons ranging from assault rifles up to the ballistic missiles the rebels can now fire deeply into Saudi Arabia to target its capital, Riyadh. Iran denies arming the rebels.

"Yemen's security and the stability of the region is the most important thing right now," Saeed said. "The United States' decision should take into account what Iran is doing in the region and the role it plays in Yemen."

In this Wednesday, Dec. 12, 2018 photo, a Yemeni woman takes a picture of another at the port of Aden in Aden, Yemen. A sense of normalcy has returned to Aden, now the seat of power for Yemen's internationally recognized government, but many challenges remain for bringing a lasting peace to the Arab world's poorest country. (AP PhotoJon Gambrell)

In this Wednesday, Dec. 12, 2018 photo, a Yemeni woman takes a picture of another at the port of Aden in Aden, Yemen. A sense of normalcy has returned to Aden, now the seat of power for Yemen's internationally recognized government, but many challenges remain for bringing a lasting peace to the Arab world's poorest country. (AP PhotoJon Gambrell)

Peace talks over ending the war wrapped up Thursday in Rimbo, Sweden, with the warring sides agreeing to a cease-fire in the strategic port city of Hodeida, where fighting has disrupted vital aid deliveries for the entire country, and a withdrawal of combatants from the city's front lines. The agreement is considered an important first step toward further talks in January aimed at drawing down the stalemated conflict.

However, more conflicts lurk just beneath the war. Throughout Aden, murals bore the flag of the former Communist South Yemen. Even soldiers escorting foreign journalists in Aden flew the tricolor red, white and black flag, its light blue chevron and red star flapping in the wind.

"It's quite clear that many Southern secessionists are now empowered; the key moving forward is going to be the solution to the southern issue," said Baron, the Yemen analyst. "Yemen will not have any sort of wider-range stability until the southern issue is dealt with in some form, and I think that's something obvious that you can't ignore if you're walking or driving through the streets of Aden."

In this Wednesday, Dec. 12, 2018 photo, Maeen Abdulmalik Saeed, the prime minister of Yemen's internationally recognized government that the Saudi-led coalition backs, sits for an interview with foreign journalists in Aden, Yemen. A sense of normalcy has returned to Aden, now the seat of power for Yemen's internationally recognized government, but many challenges remain for bringing a lasting peace to the Arab world's poorest country. (AP PhotoJon Gambrell)

In this Wednesday, Dec. 12, 2018 photo, Maeen Abdulmalik Saeed, the prime minister of Yemen's internationally recognized government that the Saudi-led coalition backs, sits for an interview with foreign journalists in Aden, Yemen. A sense of normalcy has returned to Aden, now the seat of power for Yemen's internationally recognized government, but many challenges remain for bringing a lasting peace to the Arab world's poorest country. (AP PhotoJon Gambrell)

Follow Jon Gambrell on Twitter at www.twitter.com/jongambrellap . Follow Malak Harb at www.twitter.com/malakharb .

In this Wednesday, Dec. 12, 2018 photo, Maeen Abdulmalik Saeed, the prime minister of Yemen's internationally recognized government that the Saudi-led coalition backs, is interviewed by foreign journalists in Aden, Yemen. A sense of normalcy has returned to Aden, now the seat of power for Yemen's internationally recognized government, but many challenges remain for bringing a lasting peace to the Arab world's poorest country. (AP PhotoJon Gambrell)

In this Wednesday, Dec. 12, 2018 photo, Maeen Abdulmalik Saeed, the prime minister of Yemen's internationally recognized government that the Saudi-led coalition backs, is interviewed by foreign journalists in Aden, Yemen. A sense of normalcy has returned to Aden, now the seat of power for Yemen's internationally recognized government, but many challenges remain for bringing a lasting peace to the Arab world's poorest country. (AP PhotoJon Gambrell)

In this Wednesday, Dec. 12, 2018 photo, Maeen Abdulmalik Saeed, the prime minister of Yemen's internationally recognized government that the Saudi-led coalition backs, is interviewed by foreign journalists in Aden, Yemen. A sense of normalcy has returned to Aden, now the seat of power for Yemen's internationally recognized government, but many challenges remain for bringing a lasting peace to the Arab world's poorest country. (AP PhotoJon Gambrell)

In this Wednesday, Dec. 12, 2018 photo, Maeen Abdulmalik Saeed, the prime minister of Yemen's internationally recognized government that the Saudi-led coalition backs, is interviewed by foreign journalists in Aden, Yemen. A sense of normalcy has returned to Aden, now the seat of power for Yemen's internationally recognized government, but many challenges remain for bringing a lasting peace to the Arab world's poorest country. (AP PhotoJon Gambrell)

Shokeib Hobeishy, the deputy head of the Central Bank of Yemen's internationally recognized government, gestures while speaking to foreign journalists in Aden, Yemen, Thursday, Dec. 13, 2018. A sense of normalcy has returned to Aden, now the seat of power for Yemen's internationally recognized government, but many challenges remain for bringing a lasting peace to the Arab world's poorest country. (AP PhotoJon Gambrell)

Shokeib Hobeishy, the deputy head of the Central Bank of Yemen's internationally recognized government, gestures while speaking to foreign journalists in Aden, Yemen, Thursday, Dec. 13, 2018. A sense of normalcy has returned to Aden, now the seat of power for Yemen's internationally recognized government, but many challenges remain for bringing a lasting peace to the Arab world's poorest country. (AP PhotoJon Gambrell)

Customers are reflected in a window as a cashier works at the Central Bank of Yemen's internationally recognized government in Aden, Yemen, Thursday, Dec. 13, 2018. A sense of normalcy has returned to Aden, now the seat of power for Yemen's internationally recognized government, but many challenges remain for bringing a lasting peace to the Arab world's poorest country. (AP PhotoJon Gambrell)

Customers are reflected in a window as a cashier works at the Central Bank of Yemen's internationally recognized government in Aden, Yemen, Thursday, Dec. 13, 2018. A sense of normalcy has returned to Aden, now the seat of power for Yemen's internationally recognized government, but many challenges remain for bringing a lasting peace to the Arab world's poorest country. (AP PhotoJon Gambrell)