Brad Stone joined "Newsweek's" writing staff in 1995 and became the magazine's Silicon Valley correspondent in 1998. Stone has covered a wide variety of stories, including the Mark McGwire-Sammy Sosa home run race, the Napster trial, the Microsoft antitrust suit, and the Timothy McVeigh trial. A graduate of Columbia University, Stone lives in San Francisco and is developing an unhealthy passion for robot combat, having recently bought a robotics invention kit.