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World Trade Center was attacked and there were more than 3,000 deaths -
appropriate tools are now required to obstruct terrorism -
U.S. forces invaded Iraq and destroyed Iraqi weapons of mass destruction -
left many people homeless as more than 800,000 housing units were destroyed or damaged and created damage over $81 billion and costs over $160 billion -
US gross domestic product fell by 4.3 percent, -
Barack Obama is elected as the first African American president