On April 20,1999, two teenage gunmen killed 13 people in a shooting ___A____ at Columbine High School in Littleton, Colorado, south of Denver. At approximately 11:19 a.m., Dylan Klebold, 18, and Eric Harris, 17, dressed in trench coats, began shooting students outside the school before moving inside to continue their _____B_____. By 11:35 a.m., Klebold and Harris had killed 12 fellow students and a teacher and ____C____ another 23 people. The crime prompted a national debate on gun control and school safety, as well as a major investigation to determine what motivated the teen gunmen. In the days immediately following the shootings, it was ________ (D) that Klebold and Harris purposely chose jocks, minorities, and Christians as their victims. It was initially reported that one student, Cassie Bernall, was allegedly asked by one of the gunmen if she believed in God. ________ (E) investigations also determined that Harris and Klebold choose their victims randomly. Their original plan was for two propane bombs to explode in the school’s cafeteria, potentially killing hundreds of people and forcing the survivors outside and into the gunmen’s line of fire.