On the day after the deadliest mass shooting in American history, more than 10,000 people -- including President George Bush and his wife Laura -- attended a convocation on Virginia Tech's campus just hours after authorities identified the person they say was responsible for the carnage: A 23-year-old Tech student named Cho Seung-Hui.

Tech officials described Cho Seung-Hui, a legal U.S. resident with a Centreville, Va., as a loner who lived in Harper Hall on campus.

"It's impossible to make sense of such violence and suffering," Bush said during the convocation.

Anger at the gunman and the circumstances is natural, Gov. Tim Kaine said, as is wondering whether something could have been done differently. In the midst of such questions, "do not lose touch with that sense of community," he urged.

As the Tech community, Blacksburg, the state and the country began to come to terms with Monday's massacre, details about the shootings continued to emerge.

Police announced this morning that ballistic tests overnight at a federal lab in Maryland confirmed that one of the guns recovered was used at both shooting incidents on the Tech campus -- evidence that one gunman acted alone. Police recovered two handguns, a Glock and a .22-caliber. The Roanoke Times confirmed Tuesday that Cho bought the Glock at a store in Roanoke about five weeks ago.

The death toll stood at 33, including Cho, and the identifications of others who were shot and killed were being made known. They included students from the region, from others parts of Virginia, and from other states, as well as highly-regarded professors.

Meanwhile, the community opened up its heart and arms, with multiple vigil services, and other events scheduled to try to provide some solace to the tragedy.

Tech canceled classes for the rest of the week and Montgomery County public schools, closed today, were canceled again tomorrow as the community wondered when life will return to normal.

University and law enforcement officials continued to be quested about their response to Monday's shootings. The first of which, at the West Ambler Johnston dormitory, occurred over two hours before the second, in which 31 of the 33 victims were killed in Norris Hall, an engineering classroom building.

The administrators involved have maintained that they made the best decisions they based on the information they had at the time.

Someone held a sign outside Cassell Coliseum where the convocation was held that read "Support Steger," a reference to Tech President Charles Steger. By the coliseum, someone else held a flag that read "4-16-07 VT United."