U.S Secretary of Energy Rick Perry, second from left, accompanied by Laboratory Director Charlie McMillan, second from right, learns about capabilities at the Los Alamos National Laboratory's Plutonium Facility, from Jeff Yarbrough, right, Los Alamos Associate Director for Plutonium Science and Manufacturing, Wednesday, May 10, 2017, in Los Alamos, N.M. Perry says he will advocate for nuclear power as often and as strongly as he can as the nation looks for ways to fuel its economy and limit the effects of electricity generation on the environment. (Los Alamos National Laboratory via AP)