From December 2000 to 2013, 1,043 people in the United States were wounded or killed by “active shooters” attempting to kill people “in a confined and populated area.” Although there were more to date that are not listed here of multiple deaths, you may sadly remember these:
April 1999 - Two teenage schoolboys shot and killed 12 schoolmates and a teacher at Columbine High School in Littleton, Colorado.
September 1999 - A gunman opened fire at a prayer service in Fort Worth, Texas, killing six people.
October 2002 - A series of sniper-style shootings occurred in Washington DC, leaving 10 dead.
March 2005 - A man opened fire at a church service in Brookfield, Wisconsin, killing seven people.
October 2006 - A truck driver killed five schoolgirls and seriously wounded six others in a school in Nickel Mines, Pennsylvania.
April 2007 - A student shot and killed 32 people and wounded 17 others at Virginia Tech in Blacksburg, Virginia, making it the deadliest mass shooting in the United States after 2000.
December 2007 - A 20-year-old man killed nine people and injured five others in a shopping centre in Omaha, Nebraska. February 2008 - A man opened fire in a lecture hall at Northern Illinois University in DeKalb, Illinois, killing five students and wounding 16 others. March 2009 - A 28-year-old laid-off worker opened fire while driving a car through several towns in Alabama, killing 10 people. March 2009 - A heavily-armed gunman shot dead eight people, many of them elderly and sick people, in a private-owned nursing home in North Carolina.
April 2009 - A man shot dead 13 people at a civic center in Binghamton, New York.
July 2009 - Six people, including one student, were shot in a drive-by shooting at a community rally on the campus of Texas Southern University, Houston. November 2009 - US army psychologist opened fire at a military base in Fort Hood, Texas, leaving 13 dead and 42 others wounded. January 2011 - a gunman opened fire at a public gathering outside a grocery in Tuscon, Arizona, killing six people including a nine-year-old girl and wounding at least 12 others.
July 2012 - The most injuries — 58 of them — resulted from a Colorado movie theater -12 people were killed. Masked gunman opens fire at midnight cinema screen.
August 2012 - Gunman kills six people at Slkh temple in Wisconsin.
December 2012 A man forces his way into Sandy Hook Elementary School in Newtown, Connecticut. He kills 20 first-graders and six adults. Before arriving at the school, he had killed his mother at their home.
April 2013 - Two homemade bombs detonated near the finish line of the annual Boston Marathon, killing three people and injuring several hundred others, including 16 who lost limbs.
June 2015 - A shooting in a historic black church in Charleston, SC kills nine people.
October 2017 More than 50 people were killed and at least 500 others injured when a gunman opened fire at a country music festival near the Mandalay Bay Resort and Casino on the Las Vegas Strip, authorities said.
November 2017 - 27 people were killed; including 12 to 14 children in the massacre in a Texas church on the highest death toll for the smallest Americans since 21 kids were gunned down in Sandy Hook.