Osama bin Laden death: photos suggest use of 'stealth' helicoptersIt is yet another question over the operation that killed Osama bin Laden: did the US Navy Seal team sneak up to his compound using previously top-secret "stealth" helicopters? A number of military analysts believe photographs of the wreckage of one of the two Blackhawk helicopters used in the raid, which the Seals blew up after it was damaged, show hitherto unknown modifications to the aircraft,
