How did an elite team of Navy SEALs manage to sneak up on Osama bin Laden, apparently catching him in his pajamas? With the help of top secret stealth helicopters, it seems. One of the Blackhawk helicopters used by the SEALs was damaged during the raid after clipping one of the compound's walls, forcing the team to destroy it with explosives before they left. But photos of the wreckage that remains appear to show a never-before-seen stealth helicopter that up until now was only rumored to exist, experts tell ABC News and the Army Times.
Among the changes the experts noted: a modified tail section, a noise-reducing rotor covering, a high-tech material like what is used in stealth fighters, and severe angles and flat surfaces also common to stealth jets. A former Department of Defense official describes the likely result: "You wouldn't know that it was coming right at you. And that's what's important, because these are coming in fast and low, and if they aren't sounding like they're coming right at you, you might not even react until it's too late." (Read more Blackhawk helicopter stories.)