Photo: Tom Mauser (AP Photo)

Tom Mauser, father of slain Columbine student Daniel Mauser, hugs Lori Haas, mother Emily Haas, who was wounded in the Virginia Tech shooting, at a Columbine Remembrance and Rededication ceremony on the 10th anniversary of the Columbine attack at the Capitol building in Denver, Colo., in April 2009.