Harold M. Agnew Signed Trinity Nuclear Test Mushroom Cloud Photograph.

Rare original vintage Los Alamos Scientific Laboratory photograph of the first mushroom cloud from the Trinity nuclear test, the first detonation of a nuclear weapon. Semi-glossy, black and white photographic print of the first mushroom cloud taken at 100 meters and 0.034 seconds after detonation as the mushroom cloud began to form. Boldly signed by American physicist Harold M. Agnew in the upper margin at the center right in black felt tip. The photograph was taken by Berlyn Brixner. Brixner (1911-2009) was the head photographer for the 'Trinity' test, the first-ever detonation of a nuclear weapon, on July 16, 1945. Positioned 10,000 yards away from the explosion, he utilized fifty 16mm high-speed cameras at varying film speeds and locations to capture the blast in full motion. His efforts produced over 100,000 images, documenting in detail the raw power of nuclear weaponry and visually marking the dawn of the Atomic Age. In fine condition with light creasing at the corners. Stamped on the verso is, "LASL Graphic Arts Group." The piece measures 11 inches by 8.5 inches.