2001 September 11: September 11, 2001 attacks carried out by Al-Qaeda. The attacks were carried out by Islamic Fundamentalists using hijacked commercial airplanes to damage the twin towers of the World Trade Center, and The Pentagon. Building 7 of the World Trade Center was also destroyed but was not hit with a plane. A fourth plane crashed prematurely in Pennsylvania. Over 2,500 people were killed in these attacks.
2001 September 18: November - 2001 anthrax attacks. Letters tainted with anthrax kill five across the United States, with politicians and media officials as the apparent targets. On July 31, 2008 Bruce E. Ivins a top biodefense researcher committed suicide. On August 6, 2008 the FBI concluded that Ivins was solely responsible for the attacks and suggested that Ivins wanted to bolster support for a vaccine he helped create and that he targeted two lawmakers because they were Catholics who held pro choice views.
May 2002 Mailbox Pipe Bomber: Lucas John Helder rigged pipe bombs in private mailboxes to explode when the boxes were opened. He injured 6 people in Nebraska, Colorado, Texas, Illinois, and Iowa. His motivation was to garner media attention so that he could spread a message denouncing government control over daily lives and the illegality of marijuana as well as promoting astral projection.
2002 July 4: 2002 Los Angeles Airport shooting - Hesham Mohamed Hadayet, a 41-year-old Egyptian national, kills two Israelis and wounds four others at the El Al ticket counter at Los Angeles International Airport. The FBI concluded this was terrorism, although they found no evidence linking Hadayet to any terrorist group.
October 2002 Beltway Sniper Attacks: During three weeks in October 2002 John Allen Muhammad and Lee Boyd Malvo killed 10 people and critically injured three others in Washington D.C, Baltimore, and Virginia. An earlier spree by the pair had resulted in 3 deaths in Louisiana, Alabama, Georgia, California, Arizona, and Texas to bring the total to 16 deaths. No motivation was given at the trial but evidence presented showed an affinity to the cause of the Islamic jihad.
2006 March 5: Mohammed Reza Taheri-azar injured 6 when he drove an SUV into a group of pedestrians at UNC-Chapel Hill to "avenge the deaths or murders of Muslims around the world".
2006 Seattle Jewish Federation shooting, Egyptian shoots six Jewish woman.
2007 October 26: A pair of improvised explosive devices were thrown at the Mexican Consulate in New York City. The fake grenades were filled with black powder and detonated by fuses causing very minor damage. Police were investigating the connection between this and a similar attack against the British Consulate in New York in 2005.
2008 February: In the first reported incident of animal-rights extremists physically assaulting the family members of animal researchers, six masked activists attempted to force their way into the home of a University of California, Santa Cruz, researcher and injured the researcher's husband.
2008 March 3: Four multimillion-dollar show homes place in Woodinville, Washington are torched. The Earth Liberation Front is suspected in the fires.
2008 May 4 Multiple nail laden pipe bombs exploded at a Federal Courthouse in San Diego at 1:40 AM causing "considerable damage" to the entrance and lobby and sending shrapnel two blocks away. The F.B.I. is investigating links between this attack and an April 25 explosion at the FedEx building also in San Diego.
2008 July 27 Jim D. Adkisson opened fire in the Tennessee Valley Unitarian Universalist Church in Knoxville,Tennessee killing two and injuring seven before being tackled to the ground by congregation members. A note found in his SUV indicated this was intended as a suicide attack and said the church was apparently targeted because of its support of liberal social policies.
2008 August 2, August 3 University of California-Santa Cruz molecular biologist David Feldheim's home was firebombed. A car belonging to another researcher from that University was destroyed by a firebomb in what is presumed to be related. FBI is investigating incidents as domestic terrorism related to animal rights groups.