FACT SHEET Defense Nuclear AgencyPublic Affairs OfficeWashington, D C. 20305 Subject: Project TRINITY Project TRINITY, conducted by the Manhattan Engineer District (MED), was designed to test and assess the effects of a nuclear weapon. The TRINITY nuclear device was detonated on a 100-foot tower on the Alamogordo Bombing Range in south-central New Mexico at 0530 hours on 16 July 1945. The nuclear yield of the detonation was equivalent to the... more...