[DoodleDawg]

Count the number of gold bars. Determine which of the gold bars are just gold plated Tungsten bars. Subtract the number of Tungsten bars from the bars in the depository. This sum should equal the total number of gold bars you really have. Keep this number secret. If the real number of real gold bars was known it would cause a collapse in the economy.

Interesting idea, except that the Fed does not hold any gold for the U.S. government. Fort Knox is under the control of the Treasury.

[batterycommander]

Now why, in 1987, would a metals company build a tool for pouring Tungsten ingots in the exact shape of a gold bar?

[Secret Agent Man]

Several fed banks have gold vaults. For ex the federal bank in new york holds a lot of gold, almost all for other countries, but 1-2% of the gold is held for the us government.