A displaced Syrian boy holds a chicken, as he sits outside his family's tent, at a refugee camp in Bar Elias, Bekaa Valley, Lebanon, Friday, March 5, 2021. UNICEF said Wednesday, March 10, 2021 that Syria’s 10-year-long civil war has killed or wounded about 12,000 children and left millions out of school in what could have repercussions for years to come in the country. The country's bitter conflict has killed nearly half a million people, wounded more than a million and displaced half the country’s population, including more than 5 million as refugees. (AP Photo/Hussein Malla)

Displaced Syrian girls play on a slide, at a refugee camp in Bar Elias, Bekaa Valley, Lebanon, Friday, March 5, 2021. UNICEF said Wednesday, March 10, 2021 that Syria’s 10-year-long civil war has killed or wounded about 12,000 children and left millions out of school in what could have repercussions for years to come in the country. The country's bitter conflict has killed nearly half a million people, wounded more than a million and displaced half the country’s population, including more than 5 million as refugees. (AP Photo/Hussein Malla)

Syrian displaced children play marbles outside their tents at a refugee camp in Bar Elias, Bekaa Valley, Lebanon, Friday, March 5, 2021. UNICEF said Wednesday, March 10, 2021 that Syria’s 10-year-long civil war has killed or wounded about 12,000 children and left millions out of school in what could have repercussions for years to come in the country. The country's bitter conflict has killed nearly half a million people, wounded more than a million and displaced half the country’s population, including more than 5 million as refugees. (AP Photo/Hussein Malla)

Displaced Syrian children play hopscotch outside their tent at a refugee camp in Bar Elias, Bekaa Valley, Lebanon, Friday, March 5, 2021. UNICEF said Wednesday, March 10, 2021 that Syria’s 10-year-long civil war has killed or wounded about 12,000 children and left millions out of school in what could have repercussions for years to come in the country. The country's bitter conflict has killed nearly half a million people, wounded more than a million and displaced half the country’s population, including more than 5 million as refugees. (AP Photo/Hussein Malla)

A displaced Syrian girl holds her cat, as she walks on an unpaved street at a refugee camp in Bar Elias, Bekaa Valley, Lebanon, Friday, March 5, 2021. UNICEF said Wednesday, March 10, 2021 that Syria’s 10-year-long civil war has killed or wounded about 12,000 children and left millions out of school in what could have repercussions for years to come in the country. The country's bitter conflict has killed nearly half a million people, wounded more than a million and displaced half the country’s population, including more than 5 million as refugees. (AP Photo/Hussein Malla)

A displaced Syrian boy, Omar, 10, who sells flowers on the street and who fled the war from his hometown of Hassakeh, holds a toy gun and flowers in Hamra street, Beirut, Lebanon, Jan. 31, 2021. UNICEF said Wednesday, March 10, 2021 that Syria’s 10-year-long civil war has killed or wounded about 12,000 children and left millions out of school in what could have repercussions for years to come in the country. The country's bitter conflict has killed nearly half a million people, wounded more than a million and displaced half the country’s population, including more than 5 million as refugees. (AP Photo/Hussein Malla)

A displaced Syrian girl sits outside her family's tent at a refugee camp in Bar Elias, Bekaa Valley, Lebanon, Friday, March 5, 2021. UNICEF said Wednesday, March 10, 2021 that Syria’s 10-year-long civil war has killed or wounded about 12,000 children and left millions out of school in what could have repercussions for years to come in the country. The country's bitter conflict has killed nearly half a million people, wounded more than a million and displaced half the country’s population, including more than 5 million as refugees. (AP Photo/Hussein Malla)