1950 - Griselio Torresola and Oscar Collazo, members of the Puerto Rican Nationalist Party fail to assassinate President Harry S. Truman at Blair House in Washington, D.C. on November 1, 1950. 1954 - United States Capitol shooting incident on March 1. Four Puerto Rican nationalists, led by Lolita Lebrón shoot and injure five members of the United States House of Representatives during an immigration debate.
In June 2007 after an attempt to bomb the fuel line of JFK Airport in New York City, United States authorities have claimed to have foiled potential terrorist plots against civilian and military targets. Most of the foiled plots came after the initiation of the War on Terrorism following the attacks of September 11, 2001. The following is a list of foiled terrorist plots in the United States.
The following is a timeline of acts and attempted acts that have been labelled as "terrorism" and are not believed to have been carried out by a government or its forces. Assassinations are listed at List of assassinated people. There is no single accepted definition of non-state terrorism in common use, so incidents listed here are restricted to those which: (a) are not believed to have been state-sponsored.