Girls who were kidnapped from a boarding school in the northwest Nigerian state of Zamfara, walk in line after their release, as a police officer stands close in Zamfara, Nigeria March 2, 2021. REUTERS/Afolabi Sotunde

Girls who were kidnapped from a boarding school in the northwest Nigerian state of Zamfara, wait to get into a vehicle after their release in Zamfara, Nigeria March 2, 2021. REUTERS/Afolabi Sotunde

A girl who was kidnapped from a boarding school in the northwest Nigerian state of Zamfara, lies in an ambulance after her release in Zamfara, Nigeria March 2, 2021. REUTERS/Afolabi Sotunde

Girls who were kidnapped from a boarding school in the northwest Nigerian state of Zamfara, walk in line after their release in Zamfara, Nigeria March 2, 2021. REUTERS/Afolabi Sotunde

A police officer gestures as a girl who was kidnapped from a boarding school in the northwest Nigerian state of Zamfara walks helped by a woman, after her release in Zamfara, Nigeria March 2, 2021. REUTERS/Afolabi Sotunde

A police officer gestures as girls who were kidnapped from a boarding school in the northwest Nigerian state of Zamfara walk in line after their release, in Zamfara, Nigeria March 2, 2021. REUTERS/Afolabi Sotunde

A girl who was kidnapped from a boarding school in the northwest Nigerian state of Zamfara, shows her injured foot after her release in Zamfara, Nigeria March 2, 2021. REUTERS/Afolabi Sotunde

Balarabe Kagara, father of two of the girls who were kidnapped from a boarding school in the northwest Nigerian state of Zamfara, reacts after their release, at the government house in Zamfara, Nigeria March 2, 2021. REUTERS/Afolabi Sotunde

Balarabe Kagara, father of two of the girls who were kidnapped from a boarding school in the northwest Nigerian state of Zamfara, reacts after their release, at the government house in Zamfara, Nigeria March 2, 2021. REUTERS/Afolabi Sotunde

Girls who were kidnapped from a boarding school in the northwest Nigerian state of Zamfara, look on after their release in Zamfara, Nigeria March 2, 2021. REUTERS/Afolabi Sotunde

Girls who were kidnapped from a boarding school in the northwest Nigerian state of Zamfara, look on after their release in Zamfara, Nigeria March 2, 2021. REUTERS/Afolabi Sotunde

A girl who was kidnapped from a boarding school in the northwest Nigerian state of Zamfara, looks on after her release in Zamfara, Nigeria March 2, 2021. REUTERS/Afolabi Sotunde

Girls who were kidnapped from a boarding school in the northwest Nigerian state of Zamfara, look on after their release in Zamfara, Nigeria March 2, 2021. REUTERS/Afolabi Sotunde

Girls who were kidnapped from a boarding school in the northwest Nigerian state of Zamfara, are seen after their release in Zamfara , Nigeria March 2, 2021. REUTERS/Afolabi Sotunde

Girls who were kidnapped from a boarding school in the northwest Nigerian state of Zamfara, are seen after their release in Zamfara, Nigeria March 2, 2021. REUTERS/Afolabi Sotunde

Sahrawi children stand at the Awserd refugee camp in Tindouf, Algeria February 28, 2021. Picture taken February 28, 2021. REUTERS/Ramzi Boudina

A man gets a haircut at the Awserd refugee camp in Tindouf, Algeria February 27, 2021. Picture taken February 27, 2021. REUTERS/Ramzi Boudina

A Sahrawi boy rides a bicycle at the Awserd refugee camp in Tindouf, Algeria February 27, 2021. Picture taken February 27, 2021. REUTERS/Ramzi Boudina

A Sahrawi woman carries a child at the Awserd refugee camp in Tindouf, Algeria February 27, 2021. Picture taken February 27, 2021. REUTERS/Ramzi Boudina

Sahrawi women soldiers carry their weapons and they parade at the Awserd refugee camp in Tindouf, Algeria February 27, 2021. Picture taken February 27, 2021. REUTERS/Ramzi Boudina

Sahrawi women wait to take part in a parade at the Awserd refugee camp in Tindouf, Algeria February 27, 2021. Picture taken February 27, 2021. REUTERS/Ramzi Boudina

Sahrawi women wait to take part in a parade at the Awserd refugee camp in Tindouf, Algeria February 27, 2021. Picture taken February 27, 2021. REUTERS/Ramzi Boudina

Sahrawi soldiers carry their weapons as they parade at the Awserd refugee camp in Tindouf, Algeria February 27, 2021. Picture taken February 27, 2021. REUTERS/Ramzi Boudina

Sahrawi people carry flags as they gather to watch a parade at the Awserd refugee camp in Tindouf, Algeria February 27, 2021. Picture taken February 27, 2021. REUTERS/Ramzi Boudina

Sahrawi women soldiers carry their weapons and they parade at the Awserd refugee camp in Tindouf, Algeria February 27, 2021. Picture taken February 27, 2021. REUTERS/Ramzi Boudina

Sahrawi women take part in a parade at the Awserd refugee camp in Tindouf, Algeria February 27, 2021. Picture taken February 27, 2021. REUTERS/Ramzi Boudina TPX IMAGES OF THE DAY

Sahrawi soldiers, wearing protective face masks, carry their weapons and they parade at the Awserd refugee camp in Tindouf, Algeria February 27, 2021. Picture taken February 27, 2021. REUTERS/Ramzi Boudina

Sahrawi people gather as they watch a parade at the Awserd refugee camp in Tindouf, Algeria February 27, 2021. Picture taken February 27, 2021. REUTERS/Ramzi Boudina

A Sahrawi woman soldier gets ready for a parade at the Awserd refugee camp in Tindouf, Algeria February 27, 2021. Picture taken February 27, 2021. REUTERS/Ramzi Boudina

A Sahrawi woman soldier, with henna dyed patterns on her hands, carries a weapon during a parade at the Awserd refugee camp in Tindouf, Algeria February 27, 2021. Picture taken February 27, 2021. REUTERS/Ramzi Boudina

Patrick Achi, secretary general of the Ivorian presidency, receives a vaccination against coronavirus disease (COVID-19) during a prevention campaign in Abidjan, Ivory Coast March 1, 2021. REUTERS/Luc Gnago

Sahrawi women soldiers carry their weapons and they parade at the Awserd refugee camp in Tindouf, Algeria February 27, 2021. Picture taken February 27, 2021. REUTERS/Ramzi Boudina

Sahrawi people gesture as they gather to watch a parade at the Awserd refugee camp in Tindouf, Algeria February 27, 2021. Picture taken February 27, 2021. REUTERS/Ramzi Boudina

Sahrawi women soldiers get ready for a parade at the Awserd refugee camp in Tindouf, Algeria February 27, 2021. Picture taken February 27, 2021. REUTERS/Ramzi Boudina

GL Issouf Kouyate Ivory Coast Police General Director, receives a vaccination against coronavirus disease (COVID-19) during a prevention campaign in Abidjan, Ivory Coast March 1, 2021. REUTERS/Luc Gnago

A health worker displays a vial of AstraZeneca/Oxford vaccine, during the vaccination campaign against COVID-19 in Abidjan, Ivory Coast March 1, 2021. REUTERS/Luc Gnago

Health workers stand at a vaccination center, during the campaign against coronavirus disease (COVID-19) in Abidjan, Ivory Coast March 1, 2021. REUTERS/Luc Gnago

Sahrawi soldiers carry their weapons as they parade at the Awserd refugee camp in Tindouf, Algeria February 27, 2021. Picture taken February 27, 2021. REUTERS/Ramzi Boudina

Doctor Amani Simplice, a health worker, receives a vaccination against the coronavirus disease (COVID-19) during a vaccination campaign in Abidjan, Ivory Coast March 1, 2021. REUTERS/Luc Gnago

A health worker prepares to adminster a vaccination against the coronavirus disease (COVID-19) during a vaccination campaign in Abidjan, Ivory Coast March 1, 2021. REUTERS/Luc Gnago

Raymonde Goudou Coffie, Ivory Coast's culture minister, receives a vaccination against the coronavirus disease (COVID-19) during a vaccination campaign in Abidjan, Ivory Coast March 1, 2021. REUTERS/Luc Gnago

Patrick Achi, secretary general of the Ivorian presidency, receives a vaccination against the coronavirus disease (COVID-19) during a vaccination campaign in Abidjan, Ivory Coast March 1, 2021. REUTERS/Luc Gnago

Brian Shukan, U.S. Embassy Khartoum Charge de Affairs, Rear Admiral Michael Baze, U.S. navy sixth fleet Director of the Maritime Affairs, and Captain Ibrahim Hammad Al Nayer, stand together as a U.S navy vessel docks in the eastern city of Port Sudan, Sudan March 1, 2021. REUTERS/El Tayeb Siddiq

Rear Admiral Michael Baze, U.S. navy sixth fleet Director of the Maritime Affairs, stands next to Captain Ibrahim Hammad Al Nayer, commander of the fleet of the Port Sudan Naval base, as a U.S navy vessel docks in the eastern city of Port Sudan, Sudan March 1, 2021. REUTERS/El Tayeb Siddiq

Naval officers stand on a U.S navy vessel as it docks in the eastern city of Port Sudan, Sudan March 1, 2021. REUTERS/El Tayeb Siddiq

Naval officers stand on a U.S navy vessel as it prepares to dock in the eastern city of Port Sudan, Sudan March 1, 2021. REUTERS/El Tayeb Siddiq

A U.S navy vessel carrying naval officers is seen at sea as it prepares to dock in the eastern city of Port Sudan, Sudan March 1, 2021. REUTERS/El Tayeb Siddiq

A U.S navy vessel carrying naval officers is seen at sea as it prepares to dock in the eastern city of Port Sudan, Sudan March 1, 2021. REUTERS/El Tayeb Siddiq

Balarabe Kagara looks on during an interview with Reuters after bandits kidnapped two of his daughters from the JSS Jangebe school, in Zamfara, Nigeria February 28, 2021. REUTERS/Afolabi Sotunde

A woman walks past the palace of the Emir of Anka after rumours of the release of the kidnapped girls of the JSS Jangebe school went viral on social media in Zamfara, Nigeria February 28, 2021. REUTERS/Afolabi Sotunde

Balarabe Kagara speaks during an interview with Reuters after bandits kidnapped two of his daughters from the JSS Jangebe school, in Zamfara, Nigeria February 28, 2021. REUTERS/Afolabi Sotunde

A woman walks past the palace of the Emir of Anka after rumours of the release of the kidnapped girls of the JSS Jangebe school went viral on social media in Zamfara, Nigeria February 28, 2021. REUTERS/Afolabi Sotunde TPX IMAGES OF THE DAY

Balarabe Kagara speaks with one of his sons as the family awaits news of the release of two of his daughters after bandits kidnapped them from the JSS Jangebe school, in Zamfara, Nigeria February 28, 2021. REUTERS/Afolabi Sotunde

A brother of two of the Kagara family daughters, kidnapped by bandits from the JSS Jangebe school, is seen at home awaiting news of the release of his sisters, in Zamfara, Nigeria February 28, 2021. REUTERS/Afolabi Sotunde

A woman walks past the palace of the Emir of Anka after rumours of the release of the kidnapped girls of the JSS Jangebe school went viral on social media in Zamfara, Nigeria February 28, 2021. REUTERS/Afolabi Sotunde

People walk past the palace of the Emir of Anka after rumours of the release of the kidnapped girls of the JSS Jangebe school went viral on social media in Zamfara, Nigeria February 28, 2021. REUTERS/Afolabi Sotunde

Girls stand on the rocks consulting a magazine as they carry their trays with fruits for sell, in Dakar, Senegal February 28, 2021. REUTERS/Zohra Bensemra TPX IMAGES OF THE DAY

Girls walk on the rocks as they carry their trays with fruits for sell, in Dakar, Senegal February 28, 2021. REUTERS/Zohra Bensemra

A skateboarder competes at the Red Bull Mind the Gap first skateboarding event in Egypt, inside Townhouse Gallery near Tahrir Square, amid the coronavirus disease (COVID-19) pandemic in Cairo, Egypt February 27, 2021. Picture taken February 27, 2021. REUTERS/Amr Abdallah Dalsh

Egyptian skateboarder, Yassin El-Attar, competes at the Red Bull Mind the Gap first skateboarding event in Egypt, inside Townhouse Gallery near Tahrir Square, amid the coronavirus disease (COVID-19) pandemic in Cairo, Egypt February 27, 2021. Picture taken February 27, 2021. REUTERS/Amr Abdallah Dalsh