This city, famous for being America's playground, has also become its security lab. Like nowhere else in the United States, Las Vegas has embraced the twin trends of data mining and high-tech surveillance, with arguably more cameras per square foot than any airport or sports arena in the country. Even the city's cabs and monorail have cameras. As the U.S. government ramps up its efforts to forestall terrorist attacks, some privacy advocates view the city as a harbinger of things to come.
In secret rooms in casinos across Las Vegas, surveillance specialists are busy analyzing information about players and employees. Relying on thousands of cameras in nearly every cranny of the casino, they evaluate suspicious behavior. They ping names against databases that share information with other casinos, sometimes using facial-recognition software to validate a match. And in the marketing suites, casino staffers track players' every wager, every win or loss, the better to target high-rollers for special treatment and low- and middle-rollers for promotions.