He's a master liar.
The plane to which Carter refers was an aircraft chartered by the Saudi government in the days after the terrorist attacks. The individuals were two dozen members of Osama bin Laden's extended family who had been living in the United States. Saying they were afraid that family members might suffer retribution in the U.S., the Saudis asked for American assistance in getting them out of the country. With the help of the FBI, the Saudis and the bin Laden family chartered an aircraft to pick up family members in Los Angeles, Orlando, and Washington, D.C. The bin Laden plane then flew the relatives to Boston, where — one week after the attacks — the group left Logan Airport bound for Jeddah.
**snip***
But the bin Ladens did not have to worry about that. While FBI agents looked into bin Laden family members in the Boston area immediately after September 11, it appears that the agents' first chance to interview them — or other family members who lived elsewhere in the country — came on the day they left the U.S. Each family member was given the all-clear on the basis of a single, day-of-departure interview — conducted, in Bill Carter's words, "at the airport, as they were about to leave."
Per Byron York, on NRO.