Deadliest American Mass Murder In Single Day
1.) September 11, 2001 Terrorist Attacks-3,000
2.) Oklahoma City Bombing on April 19, 1995-169
3.) Happyland Club Fire on March 25, 1990-87
4.) Pulse Nightclub Terrorist Attack on June 12, 2016-49
5.) Thomas G. Doty, Bombed Continental Airlines Flight 11 on May 22, 1962-45
5.) Bath School Bombing on May 18, 1927-45
6.) Jack Gilbert Graham, Bombed United Airlines Flight 629 on November 1, 1955-44
6.) Francisco Paula Gonzales, Murder/Suicide on board Pacific Air Lines Flight 773 on May 7, 1964-44
7.) David Burke, Killed his former supervisor and two pilots on board Pacific Southwest Airlines Flight 1771 on December 7, 1987-43
8.) Seung-Hui Cho, Virginia Tech Massacre on April 16, 2007-32
9.) Adam Lanza, Sandy Hook Massacre on December 14, 2012-27
10.) Humberto de la Torre, Set fire to Dorothy Mae Apartment Hotel in Los Angeles on September 4, 1982-25
11.) George Hennard, Killeen Massacre, October 16, 1991-23
12.) James Huberty, McDonald's Massacre at San Ysidro, California on July 18, 1984-21
13.) Charles Whitman, University of Texas Clocktower Massacre in Austin on August 1, 1966-18
The Orlando Massacre is the deadliest with gun. The deadliest prior was Virginia Tech Massacre, which is now a distant second.
9/11 is the deadliest mass murder in single day as it is the deadliest terrorist attack. It also happens to be one of the deadliest disasters in American history along with 1900 Galveston Hurricane, 1906 San Francisco Hurricane, and 1928 Lake Okeechobee Hurricane.
Some of these mass murders are obscure today. Many did not involve use of gun.