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Airport security repercussions due to the September 11 attacks
After the September 11 attacks, questions were raised regarding the effectiveness of airport security at the time, as all 19 hijackers involved in 9/11 managed to pass existing checkpoints and board the airplanes without incident. In the months and years following September 11, 2001, security at many airports worldwide was escalated to deter similar terrorist plots.
==Changes in airport security==
Prior to September 11, 2001, airport screening was provided in the U.S. by private companies contracted by the airline or airport. In November 2001, the Transportation Security Administration (TSA) was introduced to takeover all of the security functions of the FAA, the airlines, and the airports.〔 Among other changes introduced by TSA, bulletproof and locked cockpit doors became standard on commercial passenger aircraft.
In some countries, for example Sweden, Norway and Finland, there were no or only random security checks for domestic flights in year 2001 and before that.〔(Höjd säkerhet på flyget ) (di.se 12 sep 2001) (Swedish)〕 On or quickly after September 11, decisions were made to introduce full security checks there. It was immediately implemented where possible,〔 but took 1-2 years to implement everywhere since terminals were often not prepared with room for it.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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