John " Jack " Gilbert Graham ( January 23 , 1932 &ndash; January 11 , 1957 ) was an American mass murderer , who on November 1 , 1955 , killed 44 people aboard United Airlines Flight 629 near Longmont , Colorado using a dynamite time bomb . Graham planted the bomb in his mother 's suitcase , who was killed along with 43 other people , in an apparent move to claim US$ 37,500 ( US $ 343,667 today ) worth of life insurance money from policies he purchased in the airport terminal just before the flight departure
United Airlines Flight 629
United Airlines Flight 629
Jack Gilbert Graham