Police in the US are studying a letter and stories written by the gunman who killed 32 people in Virginia. 23-year-old Cho Seung-Hui was being taught one to one at Virginia Tech after writing about attacking people with chainsaws.
Thousands more watch on a big screen at the American football stadium next door. The American flag flew overhead at half mast. It started with the US national anthem. President Bush's speech was beamed in live.