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Fascinating look inside Visa ...
How Visa Protects Your Data | Fast Company
"Most people think of us as a financial institution, but the network is the brand," says Rick Knight, Visa's head of global systems operations and engineering. "If it goes down, lives are on the line." He's talking in a briefing room, its walls opaque like any other's. But with the push of a button, they become transparent glass, revealing what's beyond--a NASA-like command center with a 40-by-14-foot wall of screens, including Visa's network overlaid on a world map. The network's vital signs are constantly tracked, showing, at the moment, 8,000 transaction messages a second.