The Department of Defense is reducing the number of ships and aircraft it is contributing to Operation Tomodachi, the response to the earthquake and tsunami on March 11 and the nuclear crisis they created.
U.S. government experts trying to construct a model of radiation plumes emanating from Japan's Fukushima Daiichi power plant are being hampered by a "paucity of good data," a senior administration official told CNN.
The ongoing radioactivity releases from damaged nuclear reactors in Japan after last week's historic earthquake are creating "one of the most challenging humanitarian operations ever conducted," according to Cmdr. Jeff Davis, a spokesman for the U.S. Navy's 7th Fleet in Japan.
Tests detected low levels of radioactivity on 17 U.S. Navy helicopter crew members when they returned to the USS Ronald Reagan after conducting disaster relief missions in Japan, the military said Monday.
The nuclear-powered aircraft carrier USS Ronald Reagan arrived off the coast of Japan Sunday to support Japanese forces in disaster relief operations, the U.S. Department of Defense said in a statement.