Following the September 11, 2001 terrorist attacks on New York and
Washington, investigators laboured under the false belief that the
suspected ringleader of the 9/11 hijacking, Mohamed Atta of Egypt, had
twice travelled to Prague on urgent business in the spring of 2000,
shortly before flying from the Czech capital to the United States to join
up with his terrorist cell. In fact, two "Mohamed Attas" visited
Prague within a few days of each other.