On April 26, 1986, a failed safety test of the number 4 reactor at the nuclear power plant caused a huge explosion, releasing huge amounts of radiation into the environment.
A 2008 test showed that a 52-foot-high tsunami could strike the Fukushima nuclear plant, but bosses delayed building a protective seawall.
The Japanese government mandates a limit of 40 years for nuclear reactors; the Tokai No. 2 has been running since 1978. Today marked the fourth time Japan Atomic Power Co. filed an application with the Nuclear Regulation Authority for an extension.
The cylindrical-shaped object would most likely be U.S.-made.