In what month was the crash that Dennis Nielsen is most widely known for having participated in the rescue effort for?
Dennis Nielsen: Dennis Nielsen is a retired United States Air Force Colonel who is most widely known for having participated in rescue effort of the United Airlines Flight 232 crash in Sioux City, Iowa in 1989. United Airlines Flight 232: United Airlines Flight 232 was a DC-10, registered as N1819U, that crash-landed at Sioux City, Iowa in July 19, 1989 after suffering catastrophic failure of its tail-mounted engine, which led to the loss of all flight controls.
July