Editing 20th hijacker (section)

{{short description|Possible additional terrorist in the September 11 attacks of 2001}}
{{Use mdy dates|date=June 2013}}
{{More citations needed|date=September 2009}}

The '''20th hijacker''' is a possible additional [[Terrorism|terrorist]] in the [[September 11 attacks]] of 2001 who, for unknown reasons, was unable to participate. The 20th hijacker, though not present during the actual attacks, is said to have been deeply involved in the preparations.<ref name=cnn/> There were many variations of the 9/11 plot, with the number of terrorists fluctuating with available resources and changing circumstances. In the end, there were [[Hijackers in the September 11 attacks|19 hijackers]]: three of the planes were taken over by five members each and the fourth was hijacked by four people. The latter plane, [[United Airlines Flight 93]], crashed into a field near [[Shanksville, Pennsylvania]], due to the resistance from passengers before it could reach its target in [[Washington, D.C.]]