When filmmaker Ken Dornstein was 19 years old, his older brother David was one of 270 people killed in the bombing of Pan Am Flight 103 over Lockerbie, Scotland.
It was one of the worst terrorist attacks against Americans before 9/11, killing 189 U.S. citizens. But only one man, a Libyan, was ever convicted of the attack. Who else might have been involved? And why?
To answer these questions, Dornstein set out on a journey that led him to the 10 individuals below. Click on any profile to learn more.