Immediately after taking control of Macau, China set up a PLA garrison in the region; within a year, violent crime dropped 46 percent. The triads are still active today but operate more quietly by dominating the "junket" industry, which brings high-rollers to the territory and helps casinos collect their debts. Above, a woman plays a gaming machine at the Global Gaming Expo Asia in Macau in May 2012.

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