Memorial at Virginia Tech

Mourners participate in the day’s memorial, at the university.  (Robert Gauthier / LAT)

Norris Hall, the scene of Cho Seung-Hui’s rampage, looms in the background as Virginia Tech mourners embrace.  (Robert Gauthier / LAT)

A small teddy bear adds a little color and light to the memorial.  (Robert Gauthier / LAT)

Virginia Tech student Amber Moore releases a balloon bearing the name of Juan Ortiz, a graduate student from Puerto Rico who was killed in the shootings.  (Robert Gauthier / LAT)

Candles light a makeshift memorial before dawn on the Virginia Tech campus in Blacksburg, Va. Friday has been declared a day of mourning for the victims of the shootings.  (Mary Altaffer / AP)

Fog shrouds the campus Drill Field, where stones and flowers have been laid in memory of those slain.  (Chuck Burton / AP)

A red memorial ribbon adorns a campus tree on a foggy morning.  (Mary Altaffer / AP)

Michael Shoels, right, and family advisor Sam Riddle view the makeshift memorial. Shoels’ son Isaiah was killed in the Columbine shootings eight years ago today.  (Steve Helber / AP)

Shoels prays for the victims of the massacre. Bells were set to toll across the country Friday, marking a day of mourning for 32 students and teachers shot dead.  (Tim Sloan AFP/Getty Images)

An American flag flies at half staff outside the school’s Burruss Hall.  (Tim Sloan AFP/Getty Images)

Students and parents stand outside Norris Hall during a moment of silence.  (Evan Vucci / AP)

Virginia Tech students, staff, families and other supporters gather at the memorial.  (Scott Olson / Getty Images)

Someone has used daisies to spell out the school’s initials as part of the Drill Field memorial.  (Chuck Burton / AP)

Candles, crosses and other memorabilia grace the memorial.  (Mary Altaffer / AP)

Flowers and beads adorn one of the 33 stones in front of Burruss Hall.  (Chuck Burton / AP)

Thirty-three people were killed on the campus when Cho Seung-Hui, a 23-year-old South Korean undergraduate student in his senior year at the school, went on a shooting rampage with two handguns.  (Scott Olson / Getty Images)