Doves, heartbreak and hope on 20th anniversary of Columbine High massacre

Sean Graves, shot six times in the Columbine high school shooting, sheds a tear with his wife Kara at his side at a ceremony to commemorate the 20th anniversary of the attack in Littleton, Colorado, U.S., April 20, 2019. Graves was paralyzed from the neck down but after dozens of surgeries can now walk. REUTERS/Rick Wilking

LITTLETON, Colo. (Reuters) - A week-long series of events commemorating the 20th anniversary of the Columbine High School massacre culminated on Saturday with a remembrance ceremony celebrating the lives of the 13 victims slain in the rampage.

On April 20, 1999, two Columbine students, just three weeks shy of graduation, stormed the suburban Denver school armed with shotguns and semiautomatic weapons, fatally shooting 12 students and a teacher before committing suicide.