Although it's not my history, the Watergate Scandal has always fascinated me.
If I have it correct, Alexander Butterfield was the person who made it known and alerted people to the fact that President Nixon was taping everything in the Oval Office. He paved the way for the investigations.
He passed away a few days ago at the age of 99: RIP.
Wow, I didn't know he was still alive!
I read Woodward's book about him, THE LAST OF THE PRESIDENT'S MEN, a couple of years ago and found him impressive.