Detainees at the prison at Guantánamo Bay, Cuba, had given the courier’s pseudonym to American interrogators and said that the man was a protégé of Khalid Shaikh Mohammed, the confessed mastermind of the Sept. 11 attacks.
American intelligence officials said Sunday night that they finally learned the courier’s real name four years ago, but that it took another two years for them to learn the general region where he operated.
Still, it was not until August when they tracked him to the compound in Abbottabad, a medium-sized city about an hour’s drive north of Islamabad, the capital.