Flight numbers 93 and 175 will be permanently retired. May 18, 2011— -- United Airlines stopped using the flight numbers 93 and 175 after its planes with those flight numbers were used in the ...

September 11, 2001 – Nineteen men hijack four commercial airlines loaded with fuel for cross country flights, to carry out a terrorist attack on the United States orchestrated by al Qaeda leader Osama ...

Twenty-four years ago, the United States witnessed a series of attacks that changed the course of history. On September 11, 2001, four coordinated attacks orchestrated by suicide hijackers from the ...