Iran claimed Sunday that it had recovered data from an American spy drone that went down in Iran last year including that it was used to spy on Osama bin Laden 's house weeks before he was killed by U.S. forces. Iran also said it was building a copy of the surveillance aircraft . This type of drone has been used in Afghanistan for years and was used to keep watch on bin Laden's compound in Pakistan but U.S. officials have said little about the history of the particular drone now in Iran's possession. Iran has also been known to exaggerate its military or technological prowess. Tehran says it brought down the RQ-170 Sentinel, a top-secret surveillance drone with stealth technology, and has flaunted the capture as a victory for Iran and a defeat for the United States. The U.S. says the drone malfunctioned and downplayed any suggestion that Iran could mine the aircraft for sensitive information because of measures taken to limit the intelligence value of drones ope...