UNIDENTIFIED CNN CORRESPONDENT (voice-over): Caitlin Hess from San Antonio, Texas asks, what other terrorism attacks have devastated the United States?</s>PETER BERGEN, CNN TERRORISM ANALYST: Before the September 11th's attacks, the most important attacks of terrorism on American soil included the 1995 attack on the federal building in Oklahoma City, which killed 168 Americans, destroyed the federal building in Oklahoma City. That attack was the work of Timothy McVeigh. The other attack that was very significant was the World Trade Center bombing in 1993, which was the work of a group of Islamist radicals in the Middle East. That attack killed six people, inflicted half a billion of damage on the World Trade Center. That was the first time international terrorists had ever attacked actually on American soil.
What Other Terrorism Attacks Have Devastated United States?