PACIFIC OCEAN (March 18, 2011) The aircraft carrier USS Ronald Reagan (CVN 76) is underway off the coast of Japan conducting humanitarian assistance missions suporting Operation Tomodachi. (U.S. Navy photo by Naval Air Crewman 1st Class Jay Okonek/Released)

PACIFIC OCEAN (March 12, 2011) USS Ronald Reagan (CVN 76) is currently underway in the 7th Fleet area of responsibility in the Pacific Ocean. Ronald Reagan is enroute toward Japan to render humanitarian assistance and disaster relief as directed. (U.S. Navy photo by Mass Communication Specialist 3rd Class Dylan McCord/Released)

PACIFIC OCEAN (March 15, 2011) HH-60H Sea Hawk helicopters from the Black Knights of Helicopter Anti-Submarine Squadron (HS) 4 prepare to lift off after resupplying on the flight deck of the aircraft carrier USS Ronald Reagan (CVN 76). Ships and aircraft from the Ronald Reagan Carrier Strike Group are conducting search and rescue operations and resupply missions throughout northern Japan. Ronald Reagan is underway off the coast of Japan to provide humanitarian assistance as directed in support of Operation Tomodachi. (U.S. Navy photo by Mass Communication Specialist 3rd Class Alexander Tidd/Released)

WESTERN PACIFIC OCEAN (March 23, 2011) Lance Cpl. Juan Olguin, from Lakewood, Calif., sprays the surface of an F/A-18C Hornet assigned to the Death Rattlers of Marine Fighter Attack Squadron (VMFA) 323 aboard the aircraft carrier USS Ronald Reagan (CVN 76) during a counter-measure wash down on the flight deck. Sailors scrubbed the external surfaces on the flight deck and island superstructure to remove potential radiation contamination. Ronald Reagan is operating off the coast of Japan providing humanitarian assistance as directed in support of Operation Tomodachi. (U.S. Navy photo by Mass Communication Specialist 2nd Class Melissa Russell/Released)

PACIFIC OCEAN (March 23, 2011) Sailors aboard the aircraft carrier USS Ronald Reagan (CVN 76) monitor countermeasure wash down system sprinklers on the flight deck. Sailors scrubbed the external surfaces on the flight deck and island superstructure to remove potential radiation contamination. Ronald Reagan is operating off the coast of Japan providing humanitarian assistance as directed in support of Operation Tomodachi. (U.S. Navy photo by 2nd Class Josh Cassatt/Released)

PACIFIC OCEAN (March 23, 2011) Sailors aboard the aircraft carrier USS Ronald Reagan (CVN 76) conduct a countermeasure wash down on the flight deck. Sailors scrubbed the external surfaces on the flight deck and island superstructure to remove potential radiation contamination. Ronald Reagan is operating off the coast of Japan providing humanitarian assistance as directed in support of Operation Tomodachi. (U.S. Navy photo by Mass Communication Specialist Seaman Nicholas A. Groesch/Released)

KAMAISHI, Japan (March 21, 2011) Naval Air Crewman 2nd Class Justin Dowd, from Phoenix, surveys areas affected by a tsunami caused by a 9.0 magnitude earthquake. Dowd is assigned to the Black Knights of Helicopter Anti-Submarine Squadron (HS) 4 embarked aboard the aircraft carrier USS Ronald Reagan (CVN 76). Ronald Reagan is operating off the coast of Japan providing disaster relief and humanitarian assistance as directed in support of Operation Tomodachi. (U.S. Navy photo by Mass Communication Specialist 3rd Class Kevin B. Gray/Released)