What should have been a simple commute home for many people aboard the   Pacific Southwest Airline Flight 1771 turned into a horrific nightmare as a result of an angry man seeking revenge for his termination.   Sources - https://medium.com/@jennbaxter_69070/murder-in-the-sky-how-one-mans-rage-brought-down-a-plane-759ed697b226 Mayday: Air Disaster: Three Horrific Disasters that were linked to a breakdown in security measures https://asn.flightsafety.org/asndb/326646 https://news.google.com/newspapers?id=a68zAAAAIBAJ&sjid=JzIHAAAAIBAJ&pg=3776%2C5100444 https://news.google.com/newspapers?id=E0YjAAAAIBAJ&sjid=APADAAAAIBAJ&pg=7113%2C8413028