Columbine Killers Practice Shooting At Rifle Range

COLORADO - MARCH 6: (VIDEO CAPTURE) Eric Harris (L) and Dylan Klebold examine a sawed-off shotgun at a makeshift shooting range March 6, 1999 in Douglas County, CO in this image from video released by the Jefferson County Sheriff's Department. Approximately six weeks after this video was made, Klebold and Harris killed 13 people at Columbine High School in Littleton, CO in the worst school shooting in U.S. history. Some of the weapons seen in the video were used in the shooting. (Photo by Jefferson County Sheriff's Department via Getty Images)