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FILE--In this Jan. 16, 2013, file photo, assault weapons and hand guns are seen for sale at Capitol City Arms Supply in Springfield, Ill. Recent mass shootings spurred Congress to try to improve the background check system used during gun purchases, but experts say the system is so fractured that federal legislation being considered in Washington D.C. will do little to help keep weapons out of the hands of dangerous people. (AP Photo/Seth Perlman, file)