The elite US Navy SEALs team used top secret, never-seen-before stealth helicopters to swoop down on an unsuspecting Al Qaeda chief Osama bin Laden in his Abbottabad safe haven and shoot him dead. One of the secret choppers was disabled during the raid by the SEALs, blowing it up in an apparent bid to ensure that the frontline technology did not fall into non-US hands, US media reports said.
