On November 1, 1955, a United Flight 629 crashed near Longmont, Colorado, resulting in the deaths of all four passengers and crew. The flight, a scheduled daily operation between New York and Seattle, was en route with stops in Chicago, Denver, and Portland. Upon arrival in Denver, the aircraft was refueled and prepared for takeoff. During takeoff, the rear cargo hold, specifically compartment number 4, was emptied and loaded with mail, freight, and passenger luggage. The flight then reported its ‘off time’ to the company as 18:52 and passed the Denver VOR at 18:56. Approximately 19:03, Denver tower controllers observed two white lights in the sky north-northwest of the airport, which they later determined were the remnants of the crashed aircraft. Investigators concluded that the tail section separated mid-air during a violent explosion in the rear cargo hold due to a dynamite bomb explosion. The remaining aircraft subsequently broke up. John G. Graham, the son of a passenger, was subsequently apprehended by the Federal Bureau of Investigation (FBI) due to a grudge against his mother stemming from a childhood experience, and he was indicted for acts leading to the destruction of the aircraft by means of a bomb explosion.On November 1, 1955, a United Flight 629 crashed near Longmont, Colorado, resulting in the deaths of all four passengers and crew. The flight, a scheduled daily operation between New York and Seattle, was en route with stops in Chicago, Denver, and Portland. Upon arrival in Denver, the aircraft was refueled and prepared for takeoff. During takeoff, the rear cargo hold, specifically compartment number 4, was emptied and loaded with mail, freight, and passenger luggage. The flight then reported its ‘off time’ to the company as 18:52 and passed the Denver VOR at 18:56. Approximately 19:03, Denver tower controllers observed two white lights in the sky north-northwest of the airport, which they later determined were the remnants of the crashed aircraft. Investigators concluded that the tail section separated mid-air during a violent explosion in the rear cargo hold due to a dynamite bomb explosion. The remaining aircraft subsequently broke up. John G. Graham, the son of a passenger, was subsequently apprehended by the Federal Bureau of Investigation (FBI) due to a grudge against his mother stemming from a childhood experience, and he was indicted for acts leading to the destruction of the aircraft by means of a bomb explosion.