Donald Rumsfeld
The United States was attacked on September 11, 2001 by al Qaeda terrorists who hijacked commercial airliners and crashed them in coordinated strikes into both towers of the World Trade Center in Lower Manhattan, New York City and the Pentagon in Washington, D.C. The fourth plane crashed into a field in Shanksville, Pennsylvania, and its target was likely a prominent building in Washington, D.C., most probably either the Capitol Building or the White House. Within three hours of the start of the first hijacking and two hours after American Airlines Flight 11 struck the World Trade Center, Rumsfeld raised the defense condition signaling of the United States offensive readiness to DEFCON 3, the highest it had been since the Arab-Israeli war in 1973.
The Third Terrorist
"One indicator that this terrorist act had broader implications came directly from Abdul Hakim Murad, Yousef's roommate, childhood friend, and fellow convicted
terrorist. On the day of the bombing, Murad claimed responsibility for this terrorist act from his jail cell in New York. He bragged to his prison guards, verbally and in writing, that the bombing of the Murrah federal building was the work of the "Liberation Army." His confession was similar to the one Yousef had made two years earlier in the immediate aftermath of the first attempt to destroy the World Trade Center. Hours after he drove a Ryder truck into the garage of the north tower of the World Trade Center and detonated the deadly bomb, Yousef called the FBI from a pay phone in Newark International Airport and boasted that the "Liberation Army" had conducted the attack. He then boarded a plane and escaped, ending up in Manila, Philippines. Note: the Oklahoma City Bombing followed a similar pattern to the 1993 attack on the World Trade Center —a rental truck loaded with ammonium-based explosives, using similar detonation devices, based on the strategy of driving a vehicle into or near a target."