Twitter 上的 Defense News Nigeria:"For the Osama Bin Laden raid the CIA built “a 'quiet' helicopter that will be able to undertake dead-dark operations at low altitudes. Imagine a helicopter with contra-rotating
Stealth helicopter - Wikipedia
Aviation Geeks Scramble to ID bin Laden Raid's Mystery Copter | WIRED
Why did Seal Team Six have to blow up their downed helicopter? - Quora
New Sikorsky S-97 Raider similar to the mysterious Stealth "Osama Bin Laden raid" helicopter? - The Aviationist
U.S. suspects China saw secret chopper
Stealth helicopters' used in Bin Laden raid - BBC News
Secret, stealth chopper in compound wreckage?
Zero Dark Thirty - SEAL Gear and Helicopters - YouTube
Top-secret 'stealth helicopter' used in bin Laden raid
China May Have Studied Downed Stealth Helicopter | Here & Now
Killing bin Laden, part 2 - CBS News
The mysterious helicopter involved in the Osama Bin Laden raid - The Aviationist
Satellite Photos Show Navy SEAL Helicopter Used in Osama bin Laden Raid | Space
Reports: Secret Stealth Black Hawk Helicopters Used In Bin Laden Raid : The Two-Way : NPR