Virginia Gov. Tim Kaine on Wednesday mourned the “lost promise” of 32 lives cut short one year ago at Virginia Tech, speaking before a sea of maroon and orange on the first anniversary of the worst mass shooting on a campus in history.

“The world was cheated on April 16 a year ago, cheated out of the accomplishments that were sure to come from these extraordinary lives,” Kaine told the crowd at a ceremony on the school’s Drillfield. “Their lives were just too short for all the promise and for all the good that was within them.”