170907-N-MU551-186 ATLANTIC OCEAN (Sept. 7, 2017) Secretary of Energy Rick Perry, center, and Adm. James Caldwell transit the flight deck aboard USS Harry S. Truman (CVN 75). Truman is currently underway conducting Carrier Qualifications in preparation for future operations. (U.S. Navy photo by Mass Communication Specialist 2nd Class Mason Gillan/Released)