150126-N-ZF573-030 ATLANTIC OCEAN (Jan. 26, 2015) Capt. Daniel C. Grieco, commanding officer of the Nimitz-class aircraft carrier USS Theodore Roosevelt (CVN 71), gives a thumbs up to Capt. Barry “Butch” Wilmore, an astronaut aboard the International Space Station, during a video teleconference aboard Theodore Roosevelt. Wilmore fielded questions from the Theodore Roosevelt crew during the event. Theodore Roosevelt is underway participating in a composite training unit exercise (COMPTUEX), which tests the Theodore Roosevelt Carrier Strike Group's ability to effectively react to real-world scenarios and perform as an integrated unit. (U.S. Navy photo by Mass Communication Specialist 2nd Class Chris Brown/Released)