The Iranian video footage of the downed RQ-170 drone suggest that either Iran has one hell of a set of model builders or they somehow managed to compromise a highly secure US computer network.
If it's the latter, it may be no coincidence that in October Noah Shactman broke a story out of Creech Air Force base exposing a widespread computer virus that had fully infected drone operations. Two months ago it was believed the drones most likely to suffer from such and attack would be Reapers or Predators, but the RQ-170s also fly out of Creech AFB.
If the Iranians somehow breached the drone network and were able to reprogram the drone to make a gentle landing, in country, from 50,000 feet, it would be a military and engineering coup.
The RQ-170 doesn't require an outside signal to fly or navigate, so the suggestion that the drones signal could have been jammed is not entirely likely.
http://www.businessinsider.com/iran-drone-virus-creech-air-force-base-2011-12