WASHINGTON, May 18 (UPI) -- The CIA monitored Osama bin Laden's compound for months with stealth drone planes, U.S. officials say.
The unmanned planes, impervious to radar detection, were able to fly in Pakistani airspace without Pakistan's knowledge, unlike the Predator and Reaper drones that attack militants near the Afghan frontier, a former official who spoke on the condition of anonymity told The Washington Post.