A Concert For Virginia Tech互联网档案馆的存檔，存档日期2007-08-23. The Virginia Tech massacre; the bloodiest school massacre in U.S. history, had taken place earlier that year, on April 16, 2007, when student Seung-Hui Cho, killed 32 and wounded more, before committing suicide. Retrieved on August 1, 2007.
A Concert For Virginia Tech互联网档案馆的存檔，存档日期2007-08-23. The Virginia Tech massacre; the bloodiest school massacre in U.S. history, had taken place earlier that year, on April 16, 2007, when student Seung-Hui Cho, killed 32 and wounded more, before committing suicide. Retrieved on August 1, 2007.
