Of all the curious events of 9/11, none has aroused more suspicion among 9/11 truthseekers than Barbara Olson's alleged phone call from FL77 to her husband, Ted Olson, the US Solicitor General who was at his Justice Department office when the call was made. 

With the release of detailed records of all the phone calls from the flights attendant to the Zacarias Moussouia trial, however, we now know who was lying and who was telling the truth.  Barbara Olson is off the hook. She did not lie; nor did she tell the truth. It is not possible to do either in a phone conversation that lasts zero seconds, which is the verified length of the cell phone call she made to Ted.  Yes the call was made, but was disconnected before any conversation could take place.  [Note that the call was placed at 9:18, twenty-two minutes after the plane's transponder was turned off.  The altitude and speed of the plane at this time are unknown, but it may have been flying low and slow, making cell phone calls difficult but not impossible.]

http://www.911research.wtc7.net/planes/evidence/docs/calls/Flight77/BarbaraOlson.jpg