Like I've said, they want it all covered up because it was the epicenter of a large CIA arms smuggling and "freedom fighter" recruiting operation.
I saw a documentary the other day about the overthrow and Qaddafi, and the only thing missing from U.S. involvement was regular army boots on the ground. Otherwise U.S. forces and CIA assets filled the skies, coordinated, commanded and dropped the bombs/fired the missiles to support the overthrow. Ultimately leaving Libya in ruins and full of Islamic Fundamentalist oriented gangs.
But hey, we didn't actually "invade", so no worries.