WASHINGTON, DC – DECEMBER 14: House Oversight And Government Reform Committee Chairman Darrell Issa questions members of the Nuclear Regulatory Commission during a hearing December 14, 2011 in Washington, DC. In October the four commissioners sent a letter White House Chief of Staff William Daley expressing “grave concerns” that NRC Chairman Gregory Jaczko’s deficiencies as a leader could compromise nuclear safety. (Photo by Chip Somodevilla/Getty Images)

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