FILE - This March 27, 2006 file photo, shows a Bushmaster AR-15 semi-automatic rifle and ammunition on display at the Seattle Police headquarters in Seattle. The maker of the Bushmaster rapid-fire weapon used to kill schoolchildren in Connecticut on Friday, Dec. 14, 2012, was put up for sale on Tuesday, Dec. 18, 2012, as investors soured on the gun business. (AP Photo/Ted S. Warren, File)
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