On Sunday , the USS Ronald Reagan started delivering aid in the coastal regions of Japan 's Miyagi prefecture . The Navy says washing with soap and water removed the radioactivity . The U.S. 7th Fleet moves ships and planes away from the Fukushima Daiichi plant . The Navy says `` airborne radioactivity '' was detected 100 miles away from the plant . It is not clear if this means that there are no more radioactive particles in the air or whether it has been reduced to a level where people can breathe without being exposed. "
The Navy says washing with soap and water removed the radioactivity . The U.S. 7th Fleet moves ships and planes away from the Fukushima Daiichi plant . The Navy says `` airborne radioactivity '' was detected 100 miles away from the plant . It is not clear if this means that there are no more radioactive particles in the air or whether it has been reduced to a level where people can breathe without being exposed. "