Plant chief: Fukushima nuke plant still vulnerable
Japan Nuclear
Unit 6 reactor building, center back, and tanks of Tokyo Electric Power Co.,'s tsunami-crippled Fukushima Dai-ichi nuclear power station are seen through a bus window in Okuma, Fukushima prefecture, northeastern Japan, Tuesday, Feb. 28, 2012. Japan next month marks one year since the March 11 tsunami and earthquake, which triggered the worst nuclear accident since Chernobyl in 1986. (AP Photo/Kimimasa Mayama, Pool)