Gold was sold off at $35/ounce in the 1970's. Saw it last night on the History Channel, show called "America's Secrets"
In an effort to prove the gold was still there, Fort Knox was opened up to reporters in 1974, the reporters were showed a single room full of "gold", it was the last room left with gold in it. After the viewing, the gold in that room was traded to the Chinese for thousands of "Pong" video games
It should be noted these Pong games allowed for up to 4 players, a unique feature at the time.
The last of these early video games quit working in 1986
The reporters should have gotten a clue (it would have been their first)when they walked into Bernanke's office and seen the desk sign : "MONEY IS NO OBJECT" (the punchline is that there really is gold in Fort Knox- the soldiers just haven't been told they are guarding the Fed's gold, and not the "people's" gold)