<P> There is an escape tunnel from the lower level of the vault to be used by someone who has been accidentally locked in . </P> <P> For security reasons, no visitors are allowed inside the depository grounds . This policy has been enforced ever since the vault opened, with only two exceptions . The first was an inspection by members of the United States Congress and the news media on September 23, 1974 led by then Director of the United States Mint, Mary Brooks . The second was a similar inspection made by Kentucky Congressmen on August 21, 2017, led by Secretary of the Treasury Steven Mnuchin . </P> <P> As of November 2017, Fort Knox holdings are 4,582 metric tons (147.3 million oz . troy), with a market value of over $100 billion . In contrast, the GDP of the United States was $19.4 trillion as of April 2017 . </P> <P> Some of the gold in the depository is in the form of monetary gold coins . The 1933 Double Eagle was also a temporary resident after transfer from 7 World Trade Center in July 2001, until its sale in July 2002 for $7.59 million . Sometime in 2004, ten additional allegedly stolen 1933 Double Eagles were transported to Fort Knox for safekeeping . </P>

How much gold is there in fort knox