On Nov. 1, 1955, United Airlines Flight 629 crashed to the ground in a sugar beet farm in Longmont, Colo., approximately 30 miles north of the Windsor Readiness Center.
All 44 passengers and crew were killed when an explosive-laden package detonated in the panes' luggage compartment.
In response, starting on Nov. 2, the Colorado National Guard was called in to secure the crash site, respectfully collect remains and move them to the Longmont Armory, which served as a temporary morgue where family and friends could identify victims.
Guardsmen also safeguarded the armory.
John Gilbert Graham later admitted to planning a lethal bomb in his mother's luggage in order to collect her life insurance. He received the death penalty for his crimes and was executed in a gas chamber in Cañon City in 1956.