Trish Martino works in the Lost and Found Center at an airport in a U.S. city. "Sure, we find the usual stuff--cell phone keys, sunglasses, and wallets," she says. "But people also forget some weird things at the airport, too." What does Ms. Martino find? A woman's false teeth in the bathroom. A department store mannequin in an airport waiting area. "How do you forget those things?" Martino wonders. Nobuo Hasuda works for the Lost and Found Center in downtown Tokyo