With the recent mass shooting in Aurora, Colorado, 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 more often than not.

In cases like the infamous Columbine shooting of 1999, documentary filmmaker Michael Moore even made a film that explored the possible causes for the specific 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?

To this day, people still argue about whether this kind of massacre, or ones like it, can be prevented in the future.

As precautions in high schools and universities have been taken since the columbine school shootings and others like it, it was not the first massacre to happen and it most likely will not be the last.

Here are Five of America's most deadly shootings