FILE - In this March 6, 2013 file photo, journalists wearing protective gears are escorted to the damaged No. 4 reactor building and an under construction foundation, center right, whic

 

              FILE - In this March 6, 2013 file photo, journalists wearing protective gears are escorted to the damaged No. 4 reactor building and an under construction foundation, center right, whic
FILE - In this March 6, 2013 file photo, journalists wearing protective gears are escorted to the damaged No. 4 reactor building and an under construction foundation, center right, which will store the reactor's melted fuel rods, at Tokyo Electric Power Co.'s crippled Fukushima Dai-ichi nuclear power plant in Okuma town, Fukushima prefecture, northeast of Tokyo. The cooling system failed for a storage pool for fuel at one of the reactors at the tsunami-damaged nuclear plant in northeastern Japan Friday, April 5, 2013, - the second in a month, although there was no immediate danger from the breakdown. (AP Photo/Issei Kato, File)