This photograph released by the US Navy shows sailors conducting a wash down of the flight deck of the aircraft carrier USS Ronald Reagan on March 23, 2011 off the coast of Japan.  Navy officials halted air operations from USS Reagan on March 23, 2011 to clean the ship of contamination from radioactive plume it had passed while conducting humanitarian relief operations following the massive 9.0-magnitude earthquake and towering tsunami which battered northeast Japan on March 11. While the radiation did not pose any significant health risk, "it needs to go away," Cmdr. Ron Rutan, chief engineer for the Reagan, said during an interview on March 22.  AFP PHOTO / US NAVY