Iran supplied U.S. diplomats with the location of Taliban military units in Afghanistan after the initial bombing campaign in the fall of 2001 failed to rout them, according to former officials in the George W. Bush administration.

The Islamic regime also gave the Bush administration "really substantive cooperation" on al Qaeda after the Sept. 11, 2001 terror attacks, at one point providing Washington with a list of 220 suspects and their whereabouts, said one official, former White House National Security Council Iran expert Hillary Mann Leverett.