Sorry this is a little off the specific question, but interesting anyway. While researching the phone calls , I came across this in The New Pearl Harbor by David Ray Griffin. :
... Theodore ("Ted") Olson, the US Justice Department's Solicitor General. He said that his wife, Barbara Olson the well-known author and television commentatorhad made two phone calls to him from Flight 77 at about 9:25 and 9:30. These conversations, as reported, said nothing about where the plane was or in what direction it was headed, but they did indicate that Flight 77 had not already crashed or exploded but had been hijacked. Flight 77, therefore at least might have been die aircraft that hit the Pentagon.
Skeptics about this identification suggest that there are at least four reasons to doubt Ted Olson's testimony. First, he is very close to the Bush administration. Besides having pleaded George W. Bush's cause before the Supreme Court in the 2000 election dispute, he more recently has defended Vice President Cheney's attempt to prevent the release of papers from his energy task force to the committee investigating the Enron scandal. Second, Olson has stated that there are many situations in which "government officials might quite legitimatetly have reasons to give false information out.">21 Third, Olsons reports about the conversations with his wife are both vague and selfcontradictory.>22 Fourth, on the other flights, telephone calls were reportedly made by several passengers and flight attendants, but Ted Olson is the only person who reported receiving a call from Flight 77. This latter fact is especially strange in light of a later report that at about 9:30 the hijackers told the passengers that they were all going to die and so should call their families. Thompson asks: "Given this announcement, why are there no phone calls from this flight except for Barbara Olson's?">23 Thompson's question, in other words, is whether there really was a call from her. This question could presumably be answered by subpoenaing the telephone records of her cell phone company, American Airlines, and the Justice Department. Any of the alternative scenarios consistent with this question would need to explain, of course, what became of Barbara Olson, and also whether it is plausible that Ted Olson would have participated in a plan with that outcome. This issue is one of the problems mentioned in Chapter 9 that would face any complicity theory about "what really happened."
http://vancouver.indymedia.org/news/2004/06/141355.php