2. Perry Fellwock
Later in 1971 and inspired by Ellsberg, NSA analyst Perry Fellwock made his organization – and more importantly its surveillance activity – known to the world.
The most sensational part of Fellwock’s revelations was that the previously top secret NSA did not only keep a watch on overseas enemies (and friends) – it also spied on U.S. citizens. Consequently, the Senate Church Committee brought forward legislation to prevent, or at least restrict this domestic surveillance. The USA Patriot Act of 2001 that followed the 9/11 attacks has since reversed some of that legislation, but Fellwock’s legacy retains its importance for the changes it invoked.