C-130 YMC-130H Lockheed Hercules flight test accident crash

Top secret Iran hostage rescue mission aircraft
YMC-130H were three modified Lockheed Hercules Aircraft for Top Secret "Operation Credible Sport", for second Iran hostage crisis rescue attempt.
One of the measures considered for a second hostage rescue attempt in Iran was a project to develop a "Super STOL" aircraft, to be flown by Combat Talon crews, that would use a soccer stadium near the US Embassy as an improvised landing field. Called Credible Sport, the project acquired three C-130H transports from an airlift unit in late August 1980, one as a test bed and two for the mission, and modified them on an accelerated basis.