When night falls outside the sprawling Kadena Air Force Base in the center of Okinawa, the streets turn into a bacchanal of hard drinking, drag racing, loud music and raucous, sweaty dancing. Tattooed guys in muscle shirts and cargo pants rub against women in midriff-baring T shirts and tight jeans, and as the crowd spills from bars onto sidewalks, the night shifts into overdrive. "Hey, we're 19-year-old guys, we're away from home, we're pumped up and we're horny," says a young Marine from California. "Of course it's all about sex."
Trouble is, it's all about politics too. Last week, just hours...