Virginia Tech students, from left to right: Felix Gabathuler, 20, from Lynchburg, Va.; Michael Bell, 20, from Vienna, Va.; Natasha Sheibani, 19, from Great Falls, Va., and Margaret Riggs, 19, from Vienna, Va., stand with thousands of others in an overflow stadium during the convocation memorial attended by President Bush following the shootings on the Virginia Tech campus in Blacksburg, Va., Tuesday, April 17, 2007. (AP Photo/Charles Dharapak)