At 9:32 a.m. [on September 11, 2001] the FAA’s [Federal Aviation Administration’s] Cleveland Center received a transmission from one of the hijackers on Flight 93: ‘Keep remaining sitting. We have a bomb on board.’…Nine minutes later, the center lost the plane’s transponder signal. Indecisiveness at the ATC [Air Traffic Control] Command Center, in Herndon [Virginia], and at FAA headquarters in Washington D.C, delayed a request for military assistance. According to the 9/11 Commission’s report, ‘NORAD did not even know the plane was hijacked until it had crashed’ in a field near Shanksville, in southwestern Pennsylvania.”
– Popular Mechanics editors, Debunking 9/11 Myths, Page 19