As the country marks 26 years since the Columbine High School shooting, demonstrators say more must be done to prevent gun ...

As people visited the Columbine Memorial on Sunday afternoon, several stopped to observe the crosses with each victim's name.

The mass shooting at Columbine High School on April 20, 1999, where two students fatally shot 12 classmates and one teacher in Littleton, Colorado, made the tragedy one of the most infamous in U.S ...