U.S. Secretary of Energy Ernest Moniz, left shakes hands with Chairman Xu Dazhe of the Chinese Atomic Energy Authority before they take part in the first meeting of the Arak Working Group in Beijing, China, Thursday, March 17, 2016. The Arak Working Group, will work with Iran to oversee the redesign and reconstruction of the Arak reactor so that it cannot produce any weapons-grade plutonium. (AP Photo/Ng Han Guan, Pool)
