Underground Storage Vaults: Protecting Priceless InformationHardcover, 1 January 2020

How can important information and valuable items be kept safe as years pass? Many of these items are stored in underground vaults, including recordings and photos from U.S. history, important documents, and more. Locks, guards, secret passwords, and technology all play a part in the protection of the items. Learn more about these high-security places!