** FILE ** Vice President Joseph R. Biden gestures as he speaks at a gun-violence conference in Danbury, Conn., Thursday, Feb. 21, 2013. (AP Photo/Jessica Hill)

Photo by: Jessica Hill

** FILE ** Vice President Joseph R. Biden gestures as he speaks at a gun-violence conference in Danbury, Conn., Thursday, Feb. 21, 2013. (AP Photo/Jessica Hill)