Security At Visa's Top Secret Data Center

Prisons are easier to enter than Visa's top-secret Operations Center (WLTX - Columbia, SC)

"Physical security is the foundation where you start," says John Thielens, chief security officer of Axway, a business-software vendor. "If you can afford it, build a data center. The big guys build their own."
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Once inside, visitors encounter a "mantrap" portal, which requires a badge and biometric image of the right index finger to gain access to the data center. The digital image is necessary to pass through a phalanx of shatter-resistant glass doors.

Security is provided in layers. This article illustrates it.