A student holds a candle during a candle light vigil marking the second anniversary of the April 16, 2007 shootings at Virginia Tech on the campus of the school in Blacksburg, Va., Thursday, April 16, 2009.
A couple hug as they listen during ceremonies marking the second anniversary of the April 16, 2007 shootings at Virginia Tech on the campus of the school in Blacksburg, Va., Thursday, April 16, 2009.
Family members of those killed and injured during the Virginia Tech shootings are escorted to ceremonies marking the second anniversary of the April 16, 2007 shootings at Virginia Tech on the campus of the school in Blacksburg, Va., Thursday, April 16, 2009.
Family members of those injured and killed in the Virginia Tech shootings are escorted to ceremonies marking the second anniversary of the April 16, 2007 shootings at Virginia Tech on the campus of the school in Blacksburg, Va., Thursday, April 16, 2009.
The family of Virginia Tech shooting victim, Reema Samaha, hug after ceremonies marking the second anniversary of the April 16, 2007 shootings at Virginia Tech on the campus of the school in Blacksburg, Va., Thursday, April 16, 2009. Joseph Samaha, right, stands by while his son, Omar, left, hugs his mother Mona Samaha, center, along with daughter Randa.
Unidentified Virginia Tech students listen during memorial ceremonies marking the second anniversary of the April 16, 2007 shootings at Virginia Tech on the campus of the school in Blacksburg, Va., Thursday, April 16, 2009.
A runner with a balloon marked in remembrance of Virginia Tech shooting victim Leslie Sherman, talks to other runners prior to the start of a 3.2 mile run in honor of the 32 victims of the April 16, 2007 shootings at Virginia Tech on the campus of the school in Blacksburg, Va., Thursday, April 16, 2009. The run marked the start of the second anniversary activities.
Runners run past Norris Hall at the start of a 3.2 mile run in honor of the 32 victims of the April 16, 2007 shootings at Virginia Tech on the campus of the school in Blacksburg, Va., Thursday, April 16, 2009. The run marked the start of the second anniversary activities.
Runners run past the memorial for the 32 slain Virginia Tech students during a 3.2 mile run in honor of the victims of the April 16, 2007 shootings at Virginia Tech on the campus of the school in Blacksburg, Va., Thursday, April 16, 2009. The run marked the start of the second anniversary activities.
Virginia Tech student Kevin Sterne, who was injured in the Virginia Tech shooting two years ago, looks up at balloons released in remembrance of the 32 victims of the April 16, 2007 shootings at Virginia Tech prior to the start of a run on the campus of the school in Blacksburg, Va., Thursday, April 16, 2009. The run marked the start of the second anniversary activities.
Runners sign a remembrance banner prior to the start of a 3.2 mile run in honor of the 32 victims of the April 16, 2007 shootings at Virginia Tech on the campus of the school in Blacksburg, Va., Thursday, April 16, 2009. An estimated 4,000 people participated in the event.
Students with the Virginia Tech Corps of Cadets stand a watch at a memorial candle in front of Burruss Hall, at the memorial dedicated to victims in remembrance of the victims of the Virginia Tech massacre at the site of the memorial, Thursday, April 16, 2009, in Blacksburg, Va.
People mourn during a remembrance of the victims of the Virginia Tech massacre at the site of the memorial, Thursday, April 16, 2009, in Blacksburg, Va. Thousands signed up for a run Thursday to launch memorial events at Virginia Tech dedicated to 32 people killed by a student gunman two years ago.
People observe a midnight lighting of a candle in remembrance of the victims of the Virginia Tech massacre at the site of the memorial, Thursday, April 16, 2009, in Blacksburg, Va. Thousands signed up for a run Thursday to launch memorial events at Virginia Tech dedicated to 32 people killed by a student gunman two years ago.
Injured Virginia Tech student Fred Cook, left, hugs Lorie Haas, right in front of Burrus Hall on the campus of Virginia Tech in Blacksburg, Va., Wednesday, April 15, 2009. The second anniversary of the Virginia Tech shootings will be observed Thursday.
A group of Virginia Tech students observe a moment of silence in front of the chapel on the Drillfield on the campus of the school in Blacksburg, Va., Wednesday, April 15, 2009. The second anniversary of the Virginia Tech shootings will be observed Thursday.