Alton triangular-object report — February 10, 1967

At 7:30 p.m. on February 10, 1967 at Alton, Illinois, United States, CST. A couple saw a round, rotating, 25-foot diameter luminous object which changed color from red to white with occasional flashes of green. The object also had white lights in a triangle on the bottom (body lights). It flew, hovered, and passed over the witnesses. While hovering, a humming or droning sound was heard. (St. Louis Globe-Democrat, Missouri, 2/11/67, copy in NICAP files.).