Up until the 9-11 terrorist attacks, the worst mass murder in U.S. history was at another night club called the Happy Land Dance Club.
87 young people were killed there in 1990 when an enraged patron named Julio Gonzalez was thrown out by a bouncer. He went to a gas station and bought his murder weapon... a plastic container with $1.00 worth of gasoline that he had purchased from a nearby Amoco station.
He returned and tossed the gasoline onto the only staircase leading into the night club, and lit it on fire.
http://www.cbsnews.com/news/25th-anniversary-of-happy-land-nightclub-fire-that-killed-87/The worst school massacre in U.S history didn't involve guns either. The Bath School disaster was a series of violent attacks perpetrated by Andrew Kehoe on May 18, 1927, in Bath Township, Michigan, that killed 38 elementary schoolchildren and 6 adults and injured at least 58 other people. His weapon of choice was dynamite.
http://www.freep.com/story/news/local/michigan/2015/05/18/bath-school-disaster-michigan/27521127/We should not succumb to the insane ideas of people like Obama, King Brown, or Jagermeister who think we should give up our Constitutional Rights and freedom. Cain did not need a gun to kill Abel. Hannibal's much smaller army killed over 70,000 Roman soldiers in a single day without assault weapons in 216 B.C., long before guns were invented.