Claim: The EC-121K, an American Airborne early warning and control radar surveillance aircraft, crashed at Da Nang Airport, killing 23 of 28 on board on March 16, 1970.
Evidence: In 1962, with standardization of aircraft designations within the Department of Defense, the WV-2 then became the EC-121K. The Lockheed EC-121 Warning Star was an American Airborne early warning and control radar surveillance aircraft operational in the 1950s in both the United States Navy (USN) and United States Air Force (USAF).