is it used for protecting valuable objects?
For protection after the Japanese attack on Pearl Harbor in 1941, the Declaration of Independence, the Constitution of the United States and the Gettysburg Address were all moved for safekeeping
Protection of America's founding documents
For protection after the Japanese attack on Pearl Harbor in 1941, the Declaration of Independence, the Constitution of the United States and the Gettysburg Address were all moved for safekeeping 
what is roosevelt dime? Is the current dime, or ten-cent piece, of the United States who designed it? John R. Sinnock who is he? Eighth Chief Engraver of the United States Mint mention a few controversies of his? The letters "JS" actually stood not for John Sinnock, but for Joseph Stalin. The urban folk story coincided with the Second Red Scare. Another controversy was an allegation that Sinnock copied or borrowed the design of the President's profile from a bronze bas relief created by sculptress Selma H. Burke did the aforementioned mint struck the roosevelt dime? UNANSWERABLE who made the dime? John R. Sinnock when was the united states mint established? The Mint was created in 1792 where is its location? In Philadelphia what is fort knox and the mint's relation? Its primary purpose is for storage of the United States and other countries' gold and silver bullion reserves. is it a building or fort? Is a fortified vault building any recent incident happened over there related to shooting? On 18 October 1993, Arthur Hill went on a shooting rampage, killing three and wounding two before attempting suicide, shooting and severely wounding himself. how does air corps utilize it? As a training base during World War II.
Yes, the United States Bullion Depository. The  Declaration of Independence, the Constitution of the United States and the Gettysburg Address Yes. It is used to house a large portion of the United States' official gold reserves
Fort Knox Fort Knox Fort Knox
Bullion Depository Protection of America's founding documents Introduction
The United States Bullion Depository, often known as Fort Knox, is a fortified vault building adjacent to the Fort Knox Army Post.  Declaration of Independence, the Constitution of the United States and the Gettysburg Address were all moved   It is adjacent to the United States Bullion Depository, which is used to house a large portion of the United States' official gold reserves.
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Fort Knox [SEP] Protection of America's founding documents
For protection after the Japanese attack on Pearl Harbor in 1941, the Declaration of Independence, the Constitution of the United States and the Gettysburg Address were all moved for safekeeping to the United States Bullion Depository until Major W. C. Hatfield ordered its release after the D-Day Landings on 19 September 1944.