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Columbine High School students watch as 213 doves are released over Clement Park during a dedication ceremony for the Columbine Memorial in Littleton, Colo., Friday, Sept. 21, 2007. The placid, stone-walled oval nestled in Clement Park is next to the suburban Denver school where two student gunmen killed 12 classmates and a teacher before killing themselves on April 20, 1999, plunging the community into mourning and disbelief. (AP Photo/The Rocky Mountain News, Joe Mahoney) **DENVER OUT, MAGS OUT, TV OUT, MANDATORY CREDIT, INTERNET OUT**