Worst mass shooting in U.S. history Fifty people have died and more than 50 injured in the shooting at a gay nightclub in Orlando, Florida in the deadliest attack in recent U.S. history RECENT MASS SHOOTINGS 2016, Orlando, Florida: 50 dead and 53 injured when Omar Mateen – allegedly linked to so-called Islamic State – attacks gay nightclub Pulse 2015, 14 dead, 21 injured San Bernadino, California: Shooting and attempted bombing by Syed Rizwan Farook and Tashfeen Malik, a married couple believed to have become radicalised on the internet 2012, 27 dead, 2 injured Sandy Hook Elementary School, Connecticut: 20 year-old Adam Lanza shoots and kills 20 children, six staff members, and his mother 2012, 12 dead, 70 injured Aurora, Colorado: Heavily armed gunman James Eagan Holmes attacks during midnight screening of Batman movie, The Dark Knight Rises 2009, 13 dead, 30 injured Fort Hood, Texas: U.S. Army Major Nidal Hasan opens fire at military base killing 13 mainly miltary personnel and wounding more than 30 others 2009, 13 dead, 4 injured Binghampton, New York: Former student Jiverly Antares Wong kills teacher and students at American Civic Association immigration centre 2007, 32 dead, 17 injured Virginia Tech, Blacksburg, Virginia: Student Seung-Hui Cho opens fire on university campus killing 32 people before taking his own life 1999, 12 dead, 24 injured Columbine High School, Colorado: Senior students Eric Harris and Dylan Klebold conduct complex attack on school, killing 12 students and a teacher and injuring 24 others Source: Wire agencies Picture: Associated Press