Zacarias Moussaoui, 36, a French national of Algerian origins, pleaded guilty on April 22, 2005, to six counts of conspiracy to commit terrorism. He says he intended to take part in a post-9/11 air attack on the White House. “I came to the United States of America to be part, O.K., of a conspiracy to use airplane as a weapon of mass destruction, a statement of fact to strike the White House, but this conspiracy was a different conspiracy than 9/11.” He never got to hijack a plane because two of the staff at the flight school where Moussaoui was...