US Deadliest Shootings
Updated: 10:49pm UK, Monday 16 September 2013
The shooting at the Washington navy yard has been described by Barack Obama as "yet another mass shooting". It is part of a grim list in modern US history.
:: Sandy Hook, Connecticut, December 14, 2012:
Adam Lanza, 20, killed his mother before opening fire at Sandy Hook Elementary School in Newtown, Connecticut, killing 20 children and six adults. He then turned the gun on himself.
It is the worst school shooting in America's history and second only to the Virginia Tech massacre in terms of the country's deadliest ever attacks.
Both attacks make up a grim history of mass murders using firearms in the US.
:: Aurora, Colorado, July 20, 2012:
A masked gunman burst in on the Century 16 cinema during a midnight showing of The Dark Knight Rises throwing tear gas before opening fire.
He killed 12 and injured 58. James Eagan Holmes, 24, is the sole suspect and was arrested at the scene. He will appear in court in January.
:: Fort Hood, Killeen, Texas, November 5, 2009:
A 42-year-old US Army Major, serving as a psychiatrist, opened fire inside the US military base killing 13 and wounding 29 in an attack deemed an act of terrorism. Hasan was shot and captured and is paralysed from the waist down.
Before the killing he had been in touch with the late al Qaeda recruiter Anwar al Awlaki to ask whether he would be considered a martyr if he died shooting US soldiers.
:: Virginia Tech, Blacksburg, Virginia, April 16, 2007:
Seung-Hui Cho, 23, killed 32 and injured 17 in America's deadliest shooting. He launched two separate attacks at the campus two hours apart before killing himself.
Cho had a history of mental illness and was in therapy through his school years.
:: Nickel Mines, Pennsylvania, October 2, 2006:
Charles Carl Roberts shot dead five and injured five in an attack at an Amish school. The 32-year-old dish washer at a local restaurant then killed himself.
He was driven by anger at God over the death of his premature daughter.
:: Red Lake Indian Reservation, March 21, 2005:
Sixteen-year-old Jeffrey Weise killed his grandfather and grandfather's companion before opening fire at Red Lake High School. He killed nine and injured seven, then took his own life.
He blamed years of school bullying for the attack.
:: Forth Worth, Sept 25, 1999:
Unemployed white supremacist Larry Gene Ashbrook opened fire on the congregation of Wedgwood Baptist Church, killing seven and wounding seven. He then turned the gun on himself.
Ashbrook, 47, was a member of a group that advocated killing minorities.
:: Atlanta, July 29, 1999:
Mark Orrin Barton, a trader, opened fire in two investment offices killing nine and wounding 12. He killed himself after a six-hour police manhunt.
The 44-year-old had been upset by big financial losses.
:: Columbine High School, Colorado, April 20, 1999:
Students Eric Harris, 18, and Dylan Klebold, 17, opened fire on schoolmates after bombs they had planted in the cafeteria failed to go off. They killed 13 and injured 21 before killing themselves.
The students were motivated by their anger at society. Harris had a history of depression.
:: McDonald's, San Ysidro, California, July 18 1984:
Welder James Huberty walked into a McDonald's and opened fire killing 21 people and wounding 19 before being shot by a police sniper.
The 51-year-old thought society was about to collapse. When asked where he was going as he left the house for the killing, he told his wife: "hunting humans".
:: University of Texas, Austin, August 1, 1966:
Engineering student Charles Joseph Whitman, 25, opened fire on students from the 28th floor of the main campus building. He killed 13 and wounded 32 before being shot dead by a police marksman. He also killed his wife and mother.
In a note he said he was suffering irrational thoughts and wanted to relieve his wife and mother from suffering but offered no explanation for the university attack.