 In this April 5, 2017 photo, students sit in their classroom at the Uere special needs school in the Mare slum in Rio de Janeiro, Brazil. &quot;The children aren't safe anywhere,&quot; said Yvonne Bezerra de Mello, the founder of Uere, &quot;They wake up to the sound of gunshots and go to bed to the sound of gunshots. ... They see death at every corner.&quot; (AP Photo/Silvia Izquierdo) 