Over several decades, from the 1979 Iranian hostage crisis to attacks in the 2010s, the United States has experienced numerous terrorist attacks and incidents of violence. These include the bombing of the US embassy and marine barracks in Lebanon in 1983, the Pan Am 103 bombing in 1988, the 1993 World Trade Center bombing, and the September 11th, 2001 hijacking of four airplanes and attacks on the World Trade Center towers and Pentagon that killed nearly 3,000 people. Subsequent attacks include the 2012 Benghazi consulate attack and hostage executions by ISIS in the mid-2010s.