Three U.S. helicopters approached the fortified compound in Abbottabad in north-west Pakistan. The compound is surrounded by high walls spanning about 5.5-metres.

What aircraft was used in the raid?

The U.S. Navy SEALs arrived by helicopter, but the White House has not confirmed what model of aircraft was used. (There are some reports that the SEALS were accompanied by a RQ-170 pilot-less drone.) White House press secretary Jay Carney confirmed that one helicopter experienced mechanical failure during the raid and had to be deliberately destroyed. Based on images of the wreckage, aviation experts believe it may be a secret type of stealth helicopter.