150418-N-DV340-371 PACIFIC OCEAN (April 18, 2015) Aviation Boatswain’s Mate (Handling) Airman Jerrod Essway, from San Diego, walks through aqueous film forming foam (AFFF) after checking an AFFF distribution nozzle on the flight deck of the aircraft carrier USS Ronald Reagan (CVN 76). The ship is conducting a test of its countermeasures wash down system. Ronald Reagan is underway conducting sea trials, one of the final stages of its planned incremental availability maintenance period. (U.S. Navy photo by Mass Communication Specialist 3rd Class Chase C. Lacombe/Released)