FILE - In this April 22, 1999, file photo, Columbine High School students, from left, Darcy Craig, Molly Byrne and Emily Dubin stop to pay their respects at a makeshift memorial set up in a park near the high school in Littleton, Colo. On April 20, 1999, two teenage gunmen went on a killing rampage at Columbine High School in suburban Denver. (AP Photo/Eric Gay, File)
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