Residents unload food and water from an HH-60H Sea Hawk helicopter assigned to the Black Knights of Helicopter Anti-Submarine Squadron (HS) 4 in Miyagi Prefecture, in this U.S. Navy handout photo dated March 15, 2011. The squadron is assisting in relief efforts following the magnitude 9.0 earthquake and tsunami.

Naval Aircrewman 2nd Class Chris Carringer, assigned to the Black Knights of Helicopter Anti-Submarine Squadron (HS) 4, passes a resident a box of food delivered by an HH-60H Sea Hawk helicopter in Miyagi Prefecture, in this U.S. Navy handout photo dated March 15, 2011.

Naval Air Crewman 2nd Class Zack DelCorte, assigned to the Black Knights of Helicopter Anti-Submarine Squadron (HS) 4, delivers bottled water to a resident in Miyagi Prefecture, in this U.S. Navy handout photo dated March 15, 2011.

Chief Naval Air Crewman Steven Sinclair, assigned to the Black Knights of Helicopter Anti-Submarine Squadron (HS) 4, hugs a resident after delivering supplies from the aircraft carrier USS Ronald Reagan, in Wakuya, Miyagi Prefecture in this U.S. Navy handout photo dated March 15, 2011.

Sailors assigned to Naval Air Facility Misawa help a Misawa City employee transport salvageable fishing equipment at the Misawa Fishing Port on March 15, 2011. More than 120 sailors and airmen from the air base joined Misawa City workers and members of the community in the relief effort.

U.S. Air Force Senior Airman Steven Nizbet, 320th Special Tactics Squadron, looks for trapped survivors at Sendai airport in this U.S. military handout photo dated March 16, 2011. The squadron deployed to the airport to help clear the runway and make it ready for fixed-wing aircraft traffic following the 9.0 earthquake and tsunami.

Members of Virginia Task Force 1 from the Fairfax County Fire and Rescue Department search for survivors in Ofunato in the U.S. Navy handout photo dated March 15, 2011. International rescue teams are assisting in the search for missing residents following the earthquake and tsunami.

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 positioned off the coast of Japan, in this U.S. Navy handout photo dated March 15, 2011. Ships and aircraft from the Ronald Reagan Carrier Strike Group are conducting search and rescue operations and resupply missions following the 9.0 magnitude earthquake and tsunami.

Sailors load bottled water on an HH-60H Sea Hawk helicopter assigned to the Black Knights of Helicopter Anti-Submarine Squadron (HS) 4 aboard the aircraft carrier USS Ronald Reagan off the coast of Japan, in this U.S. Navy handout photo dated March 16, 2011. The carrier is providing humanitarian assistance to Japan in support of Operation Tomodachi following the magnitude 9.0 earthquake and tsunami.

Sailors assigned to the Black Knights of Anti-Submarine Squadron load supplies onto an HH-60H Sea Hawk helicopter aboard the aircraft carrier USS Ronald Reagan off the coast of Japan in this U.S. Navy handout photo dated March 14, 2011. The carrier is rendering humanitarian assistance following an 8.9 magnitude earthquake and tsunami.

Sailors assigned to the amphibious assault ship USS Essex watch as an MH-60S Sea Hawk helicopter prepares to transport humanitarian assistance and disaster relief supplies from the dry cargo/ammunition ship USNS Matthew Perry during a vertical replenishment in the Philippine Sea south of Japan in this U.S. Navy handout photo dated March 15, 2011. The Essex is heading to Japan to provide disaster relief following the magnitude 9.0 earthquake and tsunami.

An Australian Coast Guard chopper patrols the borders.

An MH-60S Sea Hawk helicopter transports humanitarian assistance and disaster relief supplies from the dry cargo/ammunition ship USNS Matthew Perry to the amphibious assault ship USS Essex during a vertical replenishment in the Philippine Sea, south of Japan, in this U.S. Navy handout photo dated March 15, 2011. The Essex is heading to Japan to provide disaster relief following the magnitude 9.0 earthquake and tsunami.

CH-46E Sea Knight helicopters assigned to Marine Medium Helicopter Squadron (HMM) 265, depart for Naval Air Facility Atsugi from Marine Corps Air Station Futenma, Okinawa in this U.S. military handout photo dated March 12, 2011. The helicopters will fly more than 1,000 miles over open water with emergency equipment to participate in relief operations following the magnitude 8.9 earthquake and tsunami. Picture taken March 12, 2011.

Members from the 374th Logistics Readiness Squadron unload rescue supplies at the U.S. Air Force's Yokota Air Base to assist the earthquake and tsunami recovery effort in this U.S. military handout photo dated March 14, 2011.

U.S. Marine Corps Cpl. Brandon Lopez helps load a palette of medical supplies into a KC-130J Super Hercules aircraft to provide assistance in the wake of the earthquake and tsunami that struck Japan at Marine Corps Air Station Futenma, Okinawa, on March 12, 2011. Lopez, a crew chief, is assigned to Marine Aerial Refueler Transport Squadron 152, Marine Aircraft Group 36, 1st Marine Aircraft Wing, III Marine Expeditionary Force. DoD photo by Lance Cpl. Dengrier Baez, U.S. Marine Corps.

U.S. Air Force airmen load a pallet onto a U.S. Air Force C-17A Globemaster III at March Air Reserve Base, Calif., on March 12, 2011. The supplies are en route to Japan for earthquake relief efforts.

A U.S. Air Force MC-130H Combat Talon II aircraft lands at Sendai airport in this U.S. Air Force handout photo dated March 16, 2011. This is the first fixed-wing aircraft to land at the airport since its was hit by the magnitude 9.0 earthquake and tsunami on March 11, 2011.

U.S. Marines assigned to Combat Logistics Regiment 37, 3rd Marine Logistics Group, III Marine Expeditionary Force load food onto a cargo platform to deliver to Japanese residents after an earthquake and a tsunami struck the island nation at Marine Corps Air Station Futenma on Okinawa, Japan, on March 11, 2011.

Sailors aboard the aircraft carrier USS Ronald Reagan move cases of sports drinks and water in preparation for disaster relief efforts off the coast of Japan in this U.S. Navy handout photo dated March 14, 2011. The Ronald Reagan Carrier Strike Group is conducting disaster relief operations in Japanese coastal waters in the wake of an 8.9 magnitude earthquake and subsequent tsunami.

Capt. Jim Morgan (C) Commander of Destroyer Squadron 7, coordinates search and rescue efforts with Japan Maritime Self-Defense Force Capt. Iwasaki, Commander of Escort Flotilla 1, aboard the aircraft carrier USS Ronald Reagan in this U.S. Navy handout photo dated March 13, 2011. The carrier is off the coast of Japan providing disaster relief and humanitarian assistance in support of Operation Tomodachi following the magnitude 8.9 earthquake and tsunami.

The aircraft carrier USS Ronald Reagan underway in the 7th Fleet area of responsibility in the Pacific Ocean in this U.S. Navy handout photo dated March 12, 2011. Ronald Reagan has been directed to Japan following a magnitude 8.9 earthquake and tsunami to render humanitarian assistance and disaster relief.

An HH-60H Sea Hawk helicopter lifts off from the guided-missile destroyer USS Preble after refueling in the Pacific Ocean near Sendai in this U.S. Navy handout photo dated March 13, 2011. The helicopter is conducting a search of debris fields in the waters near Sendai following Japan's magnitude 8.9 earthquake and tsunami. Picture taken March 13, 2011.