The crash of National Airlines Flight 2511 came shortly after the crash of another National Airlines plane . National Airlines Flight 967 exploded over the Gulf of Mexico on November 16 , 1959 . The cause of the explosion was believed to be a bomb in the luggage of one of the passengers , Dr. Robert Spears , who enlisted a substitute to board the plane in his place . Spears was heavily insured , and the FBI indicated that his motive was insurance fraud . Similarly , Julian Frank was covered by almost $ 900,000 in life insurance policies , including some purchased the day of the crash
National Airlines Flight 967
National Airlines Flight 967
National Airlines Flight 2511