Our national capital had visitors that has never been explained. The 1952 Washington D.C. UFO incident, also known as the Washington flap or the Washington National Airport Sightings, was a series of unidentified flying object reports from July 12 to July 29, 1952, over Washington D.C. The most publicized sightings took place on consecutive weekends, July 19–20 and July 26–27. Thanks for the information Wikipedia. Please expect 2-3 weeks before delivery. Price includes standard shipping to most countries.