Rohingya refugee Ali Hussain is restrained by his sister with a metal chain in the Balukhali refugee camp in the Bangladeshi district of Ukhia on October 15, 2017. Hussein's older sister Mairam Khatoon keeps her brother chained up, she says, for his own safety, and to keep him from wandering off and getting lost in the vast refugee camp. Khatoon says Hussain, a former schoolteacher in Burma's Rakhine province, has become mentally unstable since he witnessed his wife and three sons being killed by Burmese soldiers who slit their throats. (Photo: Indranil Mukherjee / AFP / Getty)