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Old 09-15-2017, 09:29 PM   #11
xoxoxoBruce
The future is unwritten
 
Join Date: Oct 2002
Posts: 71,105
Quote:
The vault is safeguarded by a comprehensive multilayered security system, highlighted by a 90-ton steel cylinder protecting the only entry into the vault. The nine-foot-tall cylinder is set within a 140-ton steel-and-concrete frame that, when closed, creates an airtight and watertight seal.
Yes, it sounds like that passageway in the pictures is through the rotating cylinder that aligns with or seals the entrance to the vault.
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