Complex sentence: The occupants of the aircraft were Lieutenant Colonel Gerald K. Hannaford, Captain Donald Grant Millard and Captain John F. Lorraine--all three died, becoming some of the few direct casualties of the Cold War.
Split into simpler sentences: The occupants of the aircraft were Lieutenant Colonel Gerald K. Hannaford, Captain Donald Grant Millard and Captain John F. Lorraine. All three died, becoming some of the few direct casualties of the Cold War.