ADVANCE FOR SUNDAY, MARCH 10, 2013, at 12:01 A.M. EST - FILE - In this June 29, 1972, file photo, President Richard Nixon gestures during a news conference at the White House in Washington. Few presidents in modern times have been as interested in gun control as Richard Nixon, of all people. He proposed ridding the market of Saturday night specials, contemplated banning handguns altogether and refused to pander to gun owners by feigning interest in their weapons. At the news conference, about six weeks after George Wallace's shooting, Nixon said he'd sign legislation banning Saturday night specials. Later that year, the Senate did pass such a bill, but the House never acted on the legislation. (AP Photo)