190331-N-QD512-0414 ATLANTIC OCEAN (March 31, 2019) Machinist's Mate 2nd Class Ronald Armstead, from Allenstown, Penn., left, and Machinist's Mate 2nd Class Francis Caoleng, from San Marcos, Calif., sample liquid oxygen in the O2N2 shop aboard the aircraft carrier USS Dwight D. Eisenhower (CVN 69) during an underway in the Atlantic Ocean, March 31, 2019. Dwight D. Eisenhower is underway conducting sea trials during the final portion of a planned incremental availability as part of the maintenance phase of the Optimized Fleet Response Plan. (U.S. Navy photo by Mass Communication Specialist 3rd Class Kaleb Sarten/Released)