In the heart of Data Center Alley - a patch of suburban Washington where much of the world's internet traffic flows - Visa operates its global fraud command center. The numbers are enormous. Every year, $15 trillion flows through Visa's networks, representing roughly 15 percent of the world's economy and bad actors constantly try to syphon off a piece of that massive money flow. To stay ahead, Visa has invested $12 billion over the past five years building AI-powered cyber fraud detection capabilities, knowing that criminals are also spending big. "You have everybody from a single individual threat actor who's looking to make a quick buck all the way to really corporatized criminal organizations that generate tens or hundreds of millions of dollars annually from fraud and scam activities," Michael Jabbara, Visa's global head of fraud solutions, tells AFP during a tour of the company's security campus. IMAGES AND SOUNDBITES