 
John Travers was striding purposefully into the Westfield mall in Wheaton, Maryland, for some back-to-school shopping before starting his junior year at Bowling Green State University. When I asked him whether he'd ever talked to a military recruiter, Travers, a 19-year-old African American with a buzz cut, a crisp white T-shirt, and a diamond stud in his left ear, smiled wryly. "To get to lunch in my high school, you had to pass recruiters," he said. "It was overwhelming." Then he added, "I thought the recruiters had too much information about me. They called me, but I never gave them my phone number."
Nor did he give the recruiters his email address, Social Security  number, or details about his ethnicity, shopping habits, or college  plans. Yet they probably knew all that, too. In the past few years, the  military has mounted a virtual invasion into the lives of young  Americans. Using data mining, stealth websites, career tests, and  sophisticated marketing software, the Pentagon is harvesting and  analyzing information on everything from high school students' GPAs and  SAT scores to which video games they play. Before an Army recruiter even  picks up the phone to call a prospect like Travers, the soldier may  know more about the kid's habits than do his own parents.
 
