- Gerald Bull was a brilliant artillery engineer who dreamed of building a supergun to launch satellites into orbit.
- After early successes with Project HARP, Bull faced cancellations and moved to private arms dealing.
- He supplied advanced artillery to South Africa and Iraq, leading to legal troubles and imprisonment.
- Under Saddam Hussein, he worked on Project Babylon to construct a massive supergun.
- Bull's poor political awareness and confrontational style contributed to his assassination in 1990.
- His death marked the likely end of supergun artillery technology.