Yemeni ministers attend the first meeting of their cabinet, a day after they survived an attack on Aden airport, in Aden, Yemen December 31, 2020. REUTERS/Fawaz Salman

Yemeni Prime Minister Maeen Abdulmalik addresses the first meeting of his cabinet, a day after he and the ministers survived an attack on Aden airport, in Aden, Yemen December 31, 2020. REUTERS/Fawaz Salman

Yemeni ministers pray as they attend the first meeting of their cabinet, a day after they survived an attack on Aden airport, in Aden, Yemen December 31, 2020. REUTERS/Fawaz Salman

Yemeni government officials speak to a man injured in an attack on Aden airport, at a hospital in Aden, Yemen December 31, 2020. REUTERS/Fawaz Salman

Yemeni government officials speak to a man injured in an attack on Aden airport, at a hospital in Aden, Yemen December 31, 2020. REUTERS/Fawaz Salman

Yemeni government officials, including Foreign Minister Ahmed bin Mubarak, speak to each other at Aden airport after explosions hit the airport upon the arrival of a newly formed cabinet for government-held parts of Yemen, at the airport in Aden, Yemen December 30, 2020. REUTERS/Fawaz Salman

People react after explosions hit Aden airport, upon the arrival of the newly-formed Yemeni government in Aden, Yemen December 30, 2020. REUTERS/Fawaz Salman

People react after explosions hit Aden airport, upon the arrival of the newly-formed Yemeni government in Aden, Yemen December 30, 2020. REUTERS/Fawaz Salman

People walk on the tarmac as dust and smoke rise after explosions hit Aden airport, upon the arrival of the newly-formed Yemeni government in Aden, Yemen December 30, 2020. REUTERS/Fawaz Salman

A military vehicle is seen on the tarmac as dust rises after explosions hit Aden airport, upon the arrival of the newly-formed Yemeni government in Aden, Yemen December 30, 2020. REUTERS/Fawaz Salman

People react as dust rises after explosions hit Aden airport, upon the arrival of the newly-formed Yemeni government in Aden, Yemen December 30, 2020. REUTERS/Fawaz Salman TPX IMAGES OF THE DAY

A security personnel member reacts as dust rises after explosions hit Aden airport, upon the arrival of the newly-formed Yemeni government in Aden, Yemen December 30, 2020. REUTERS/Fawaz Salman

Dust rises after explosions hit Aden airport, upon the arrival of the newly-formed Yemeni government in Aden, Yemen December 30, 2020. REUTERS/Fawaz Salman TPX IMAGES OF THE DAY

A Saudi officer walks with an army officer of Yemen's separatist Southern Transitional Council (STC) are pictured during the redeployment of STC forces from the southern Yemeni province of Abyan, Yemen December 14, 2020. REUTERS/Adam Muhammad

Military personnel of Yemen's separatist Southern Transitional Council are pictured during their redeployment from the southern Yemeni province of Abyan, Yemen December 14, 2020. REUTERS/Adam Muhammad

Military personnel of Yemen's separatist Southern Transitional Council are pictured during their redeployment from the southern Yemeni province of Abyan, Yemen December 14, 2020. REUTERS/Adam Muhammad

Saudi military personnel are pictured with members of Yemen's separatist Southern Transitional Council (STC) forces during the redeployment of STC forces from the southern Yemeni province of Abyan, Yemen December 14, 2020. REUTERS/Adam Muhammad

Military personnel of Yemen's separatist Southern Transitional Council are pictured during their redeployment from the southern Yemeni province of Abyan, Yemen December 14, 2020. REUTERS/Adam Muhammad

Military personnel of Yemen's separatist Southern Transitional Council are pictured during their redeployment from the southern Yemeni province of Abyan, Yemen December 14, 2020. REUTERS/Adam Muhammad

Artist Ahlam Nasser paints on a plate using coffee at her home in Sanaa, Yemen November 23, 2020. Picture taken November 23, 2020. REUTERS/Khaled Abdullah

Artist Ahlam Nasser paints on a plate using coffee at her home in Sanaa, Yemen November 23, 2020. Picture taken November 23, 2020. REUTERS/Khaled Abdullah

Artist Ahlam Nasser paints on a plate using coffee at her home in Sanaa, Yemen November 23, 2020. Picture taken November 23, 2020. REUTERS/Khaled Abdullah

Artist Ahlam Nasser paints on a plate using coffee at her home in Sanaa, Yemen November 23, 2020. Picture taken November 23, 2020. REUTERS/Khaled Abdullah

Pieces painted by artist Ahlam Nasser are seen on a wall at her home yard in Sanaa, Yemen November 23, 2020. Picture taken November 23, 2020. REUTERS/Khaled Abdullah

Pieces painted by artist Ahlam Nasser are seen on a wall at her home in Sanaa, Yemen November 23, 2020. Picture taken November 23, 2020. REUTERS/Khaled Abdullah

Artist Ahlam Nasser explains pieces she painted at her home yard in Sanaa, Yemen November 23, 2020. Picture taken November 23, 2020. REUTERS/Khaled Abdullah

A view shows the damage at a Saudi Aramco oil company distribution station that Yemeni Houthis say they attacked, in the city of Jeddah, Saudi Arabia, November 24, 2020. REUTERS/Nael Shyoukhi

A view shows the damage at a Saudi Aramco oil company distribution station that Yemeni Houthis say they attacked, in the city of Jeddah, Saudi Arabia, November 24, 2020. REUTERS/Nael Shyoukhi

The debris are seen at a Saudi Aramco oil company distribution station that Yemeni Houthis say they attacked, in the city of Jeddah, Saudi Arabia, November 24, 2020. REUTERS/Nael Shyoukhi

An employee is seen in front of the damage at a Saudi Aramco oil company distribution station that Yemeni Houthis say they attacked, in the city of Jeddah, Saudi Arabia, November 24, 2020. REUTERS/Nael Shyoukhi

A general view shows the damage at a Saudi Aramco oil company distribution station that Yemeni Houthis say they attacked, in the city of Jeddah, Saudi Arabia, November 24, 2020. REUTERS/Marwa Rashad

A general view shows the damage at a Saudi Aramco oil company distribution station that Yemeni Houthis say they attacked, in the city of Jeddah, Saudi Arabia, November 24, 2020. REUTERS/Marwa Rashad

A member of the staff stands next to the damage at a Saudi Aramco oil company distribution station that Yemeni Houthis say they attacked, in the city of Jeddah, Saudi Arabia, November 24, 2020. REUTERS/Marwa Rashad

A view shows the damage at a Saudi Aramco oil company distribution station that Yemeni Houthis say they attacked, in the city of Jeddah, Saudi Arabia, November 24, 2020. REUTERS/Nael Shyoukhi

A general view shows the damage at a Saudi Aramco oil company distribution station that Yemeni Houthis say they attacked, in the city of Jeddah, Saudi Arabia, November 24, 2020. REUTERS/Marwa Rashad

A general view shows the damage at a Saudi Aramco oil company distribution station that Yemeni Houthis say they attacked, in the city of Jeddah, Saudi Arabia, November 24, 2020. REUTERS/Marwa Rashad

A general view shows the damage at a Saudi Aramco oil company distribution station that Yemeni Houthis say they attacked, in the city of Jeddah, Saudi Arabia, November 24, 2020. REUTERS/Nael Shyoukhi

A general view shows the damage at a Saudi Aramco oil company distribution station that Yemeni Houthis say they attacked, in the city of Jeddah, Saudi Arabia, November 24, 2020. REUTERS/Nael Shyoukhi

People attend a rally marking the birthday of Prophet Muhammad in Sanaa, Yemen October 29, 2020. REUTERS/Khaled Abdullah

People attend a rally marking the birthday of Prophet Muhammad in Sanaa, Yemen October 29, 2020. REUTERS/Khaled Abdullah

People shout slogans during a rally marking the birthday of Prophet Muhammad in Sanaa, Yemen October 29, 2020. REUTERS/Khaled Abdullah

A man attends a rally marking the birthday of Prophet Muhammad in Sanaa, Yemen October 29, 2020. REUTERS/Khaled Abdullah

A man with the name of Prophet Muhammad painted on his face attends a rally marking the birthday of Prophet Muhammad in Sanaa, Yemen October 29, 2020. REUTERS/Khaled Abdullah TPX IMAGES OF THE DAY

People attend a rally marking the birthday of Prophet Muhammad in Sanaa, Yemen October 29, 2020. REUTERS/Khaled Abdullah

People watch as Houthi leader Abdul-Malik Badruddin al-Houthi delivers a speech on a TV screen during a rally marking the birthday of Prophet Muhammad in Sanaa, Yemen October 29, 2020. REUTERS/Khaled Abdullah

People step on a poster of French President Emmanuel Macron as they arrive to a rally marking the birthday of Prophet Muhammad in Sanaa, Yemen October 29, 2020. REUTERS/Khaled Abdullah

People step on a poster of French President Emmanuel Macron as they arrive to a rally marking the birthday of Prophet Muhammad in Sanaa, Yemen October 29, 2020. REUTERS/Khaled Abdullah

Posters calling for boycotting French products are seen at a supermarket in Sanaa, Yemen October 26, 2020. REUTERS/Khaled Abdullah

A poster calling for boycotting French products is seen at a supermarket in Sanaa, Yemen October 26, 2020. REUTERS/Khaled Abdullah

A woman shops next to posters calling for boycotting French products at a supermarket in Sanaa, Yemen October 26, 2020. REUTERS/Khaled Abdullah

A woman shops next to posters calling for boycotting French products at a supermarket in Sanaa, Yemen October 26, 2020. REUTERS/Khaled Abdullah

Fabrizio Carboni, Regional Director for the Near and Middle East of the International Committee of the Red Cross (ICRC), Abdulkader al-Murtada, Head of the Houthi prisoner exchange committee and Hadi Haig, Head of the Yemeni government delegation, react after the closing plenary of the fourth meeting of the Supervisory Committee on the Implementation of the Prisoners' Exchange Agreement in Yemen, in Glion, Switzerland, September 27, 2020. REUTERS/Denis Balibouse

Hadi Haig, Head of the Yemeni government delegation is pictured after the closing plenary of the fourth meeting of the Supervisory Committee on the Implementation of the Prisoners' Exchange Agreement in Yemen, in Glion, Switzerland, September 27, 2020. REUTERS/Denis Balibouse

Hadi Haig, Head of the Yemeni government delegation is pictured after the closing plenary of the fourth meeting of the Supervisory Committee on the Implementation of the Prisoners' Exchange Agreement in Yemen, in Glion, Switzerland, September 27, 2020. REUTERS/Denis Balibouse

Abdulkader al-Murtada, Head of the Houthi prisoner exchange committee, Hadi Haig, Head of the Yemeni government delegation and Martin Griffiths, United Nations Special Envoy for Yemen pose for a photograph after the closing plenary of the fourth meeting of the Supervisory Committee on the Implementation of the Prisoners' Exchange Agreement in Yemen, in Glion, Switzerland, September 27, 2020. REUTERS/Denis Balibouse

Fabrizio Carboni, Regional Director for the Near and Middle East of the International Committee of the Red Cross (ICRC), Abdulkader al-Murtada, Head of the Houthi prisoner exchange committee, Hadi Haig, Head of the Yemeni government delegation and Martin Griffiths, United Nations Special Envoy for Yemen pose for a photograph after the closing plenary of the fourth meeting of the Supervisory Committee on the Implementation of the Prisoners' Exchange Agreement in Yemen, in Glion, Switzerland, September 27, 2020. REUTERS/Denis Balibouse

Abdulkader al-Murtada, Head of the Houthi prisoner exchange committee shakes hands with Hadi Haig, Head of the Yemeni government delegation after the closing plenary of the fourth meeting of the Supervisory Committee on the Implementation of the Prisoners' Exchange Agreement in Yemen, in Glion, Switzerland, September 27, 2020. REUTERS/Denis Balibouse

Houthi followers stand by bills of Yemeni currency during a ceremony held by Houthis to collect supplies for their fighters battling government forces in various frontlines, in Sanaa, Yemen September 24, 2020. REUTERS/Khaled Abdullah

Houthi followers stand by bills of Yemeni currency during a ceremony held by Houthis to collect supplies for their fighters battling government forces in various frontlines, in Sanaa, Yemen September 24, 2020. REUTERS/Khaled Abdullah

Houthi followers stand by bills of Yemeni currency during a ceremony held by Houthis to collect supplies for their fighters battling government forces in various frontlines, in Sanaa, Yemen September 24, 2020. REUTERS/Khaled Abdullah TPX IMAGES OF THE DAY