Chief of Naval Operations Adm. Jonathan W. Greenert, left, accompanied by Adm. John M. Richardson, director of the Naval Nuclear Propulsion Program, speaks during a news conference at the Pentagon, Tuesday, Feb. 4, 2014. The Navy is investigating alleged cheating on tests by senior enlisted sailors training on naval nuclear reactors at Charleston, S.C., officials said Tuesday (AP Photo/Manuel Balce Ceneta)
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