Photo: Arapahoe High School shooting anniversary 2

Arapahoe High students and supporters holding a candle light vigil and watch as 14 white balloons symbolizing the Colo. students killed in school shootings since the 1999 Columbine school massacre are released, during a remembrance ceremony marking one year since the shooting at Arapahoe High School, in Centennial, Colo., Saturday, Dec. 13, 2014.