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Bush Names New Head Of U.S. Nuclear Agency --> President Bush (file photo) (epa) January 5, 2007 -- The White House says U.S. President George W. Bush has chosen a replacement for the man forced out as head of the U.S. government's nuclear weapons program following reports of security breakdowns

Bush selected Thomas D'Agostino, who currently serves as deputy administrator of defense programs at the National Nuclear Security Administration (NNSA). The White House says he will succeed Linton Brooks in the top job there on an acting basis.

The NNSA maintains the nuclear weapons stockpile and oversees the nation's weapons-research laboratories.

Brooks was reprimanded in June for failing to report the theft of computer files at an NNSA facility. Months later, hundreds of pages of classified weapons-related documents from the Los Alamos National Laboratory in New Mexico were found during a drug raid in the home of a woman who had worked at the lab.

2006 In Review

LOOKING BACK: A photo gallery of the key news events of 2006. ...more