More than 400 guns, including these three, were turned in during a Dallas gun buyback program in January. But determining the effectiveness of such programs is difficult due to limits on gun-related research.
Wayne LaPierre, executive vice president and CEO of the National Rifle Association, testifies while NRA President David Keene listens during a Senate Judiciary Committee hearing on gun violence Wednesday.
Credit Mark Wilson / Getty Images
The halting testimony of former Arizona Rep. Gabrielle Giffords, gravely injured in a mass shooting two years ago, may have provided the most gripping moments of the Senate's first gun control hearing this session.
But the star witness on Capitol Hill on Wednesday was Wayne LaPierre, the National Rifle Association's top lobbyist.