Boys recite poems during a session at a rehabilitation center for former child soldiers in Marib, Yemen, in this July 25, 2018, photo. The Houthi rebels have enlisted some 18,000 child fighters over the course of the 4-year-old civil war, according to one Houthi official. Their experiences in combat, including seeing bodies of the dead and charging into battle as missiles explode, have left many of the boys traumatized. (AP Photo/Nariman El-Mofty), APTOPIX