<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 the congress members on August 21, 2017, led by Secretary of the Treasury Steven Mnuchin . </P> <P> As of April 2016, Fort Knox holdings are 4,582 metric tons (147.3 million oz . troy). At the rate of $1,226.60 an ounce it is worth about $180 billion . </P> <P> The depository also holds 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 does the us federal reserve have