TOPSHOT - Schoolchildren learn how to protect themselves in case of a bombardment during a war safety awareness class as part of a campaign conducted by the Syrian civil defence, known as The White Helmets, in the rebel-held area of Harasta, on the northeastern outskirts of the capital Damascus, on May 2, 2017. / AFP PHOTO / Sameer Al-Doumy        (Photo credit should read SAMEER AL-DOUMY/AFP/Getty Images)