Look...You don't make a hit like this unless you're 99% sure. It wasn't just a compound..and they've been watching him for months....and listening for months.
The 1%....they had to be fast enough that Osama couldn't blow the place up.
There was even one report posted on FR that had a Predator in the air. We have them flying there most of the time. Maybe the one that was in air was not armed but was collecting Intel. We will never know and really we do not need to know. Someone 50 years from now will see all of the truth on the Military Channel... or whatever exists then.
LLS