On March 24, 2002, Cheney again told NBC, "We discovered . . . the allegation that one of the lead hijackers, Mohamed Atta, had, in fact, met with Iraqi intelligence in Prague."
A few weeks later, in April, FBI Director Robert S. Mueller III told a San Francisco audience, "We ran down literally hundreds of thousands of leads and checked every record we could get our hands on, from flight reservations to car rentals to bank accounts." The FBI, he said, could find no evidence that Atta left or returned to the United States at the time.
In May, senior FBI and CIA analysts, having scoured thousands of travel records, concluded "there was no evidence Atta left or returned to the U.S.," according to officials at the time.
But on Sept. 8, 2002, Cheney, again on "Meet the Press," said that Atta "did apparently travel to Prague. . . . We have reporting that places him in Prague with a senior Iraqi intelligence officer a few months before the attacks on the World Trade Center."