Mission improbable: Challenging the official story of 9/11

For more than four years, the public has repeatedly been urged to ignore "outrageous" conspiracies theories about the Sept. 11, 2001, attacks that set in motion the so-called "war on terrorism." However, the official explanation that has been provided - and widely embraced - also requires the acceptance of a theory, one involving a massive intelligence failure, 19 Muslim hijackers under the sway of Osama bin Laden, and the inability of the world’s most advanced Air Force to intercept four commercial airplanes.