FILE - In this May 1, 2002, demonstrators hold a banner reading "No private possession of firearms" during a march five days after a 19-year-old former student shot 16 people before kil

 

              FILE - In this May 1, 2002, demonstrators hold a banner reading "No private possession of firearms" during a march five days after a 19-year-old former student shot 16 people before kil
FILE - In this May 1, 2002, demonstrators hold a banner reading "No private possession of firearms" during a march five days after a 19-year-old former student shot 16 people before killing himself in a rampage shooting at a high school, in Erfurt, eastern Germany. Gun advocates, including the powerful lobby group the National Rifle Association, have blocked attempts to toughen American gun laws in the wake of previous mass shootings. Supporters of gun control often cite Australia's dramatic response to a 1996 shooting spree in the southern state of Tasmania that killed 35 people. Gun laws also were strengthened in Canada after the 1989 slaying of 14 female engineering students in Montreal by a woman-hating gunman, and in Germany after a 19-year-old expelled student killed 16 people, including 12 teachers, in Erfurt in 2002. (AP Photo/Jens Meyer, File)