The Aviationist has a great archive section on the December 2011 American RQ-170 falling into Iranian hands.
The Aviationist.“Category Archives: Captured Stealth Drone.”
Lenziran Newsviedo. “IRGC commander tell how the US RQ 170 Drone was captured and its content & technology accessed.” Youtube. February 6, 2013. http://www.youtube.com/watch?v=mHZZXR7Av_k