With the mass shooting in Aurora, Colo., that left 12 people dead and 38 others injured, authorities can now add another horrible incident to the long list of random massacres that have plagued the United States.
While officials claim to be working around the clock in an effort to raise awareness and protect innocent civilians from happenings like this most recent one, it seems as if these random shootings are taking place with terrible frequency.
After the Columbine high school massacre of 1999, filmmaker Michael Moore even made a documentary, "Bowling For Columbine," that explored the possible causes for that shooting and other random acts of gun violence.
In one memorable scene from the movie, Moore discovers how a bank in Michigan would give customers a free hunting rifle when they made a deposit of a certain size into a time deposit account. During the scene, a camera follows Moore as he goes to the bank, makes his deposit, fills out the forms and awaits the result of a background check before walking out of the bank carrying a brand new Weatherby hunting rifle.
Just before leaving the bank, Moore asks the teller, "Do you think it's a little dangerous to be handing out guns at a bank?"
Precautions in high schools and universities have been taken since the Columbine school shootings and others like it. But if history is any guide, chances are the Colorado movie theater massacre most likely will not be the last mass shooting in the United States.
Here are five of America's most deadly shootings.