U.S. Air Force Chief of Staff Gen. Norton Schwartz told Reuters that the cause behind the crash of the RQ-170 has been established.
Schwartz added that the service continues to use the RQ-170 for data collection.
[thumb]http://www.reuters.com/article/2012/01/13/us-usa-drone-iran-idUSTRE80C1MD20120113[/thumb]