During his visit to Dulles, Virginia, a thousand AOL staffers crowded into a tent to hear from their new C.E.O. He walked onstage with his jacket unbuttoned and the knot of his yellow tie not quite pulled up to his shirt collar. He stands six feet four, and has a full head of wavy black hair, high cheekbones, and large front teeth. Although he limped slightly from an old hip injury, he exuded a sense of command. "Are you guys committed to putting America back online?" he bellowed.