In this frame from a dashboard camera provided by the Portland Police Department, a fireball streaks across the sky early Tuesday, May 17, 2016, in Portland, Maine. The bright flash visible from several states was apparently left by a meteor burning up as it passed through the earth's atmosphere. (Portland Police Department via AP)PORTLAND, Maine (AP) — A police sergeant looking for speeders captured a fireball streaking across the sky on his dashboard camera early Tuesday.