|Intl. Notebook||May 9 2015|
Operation Greenhouse took place on Enewetak Atoll at the Pacific Proving Grounds, with the aim of exploring methods for expanding the destructive capacity of nuclear weapons while reducing the amount of fissile material needed. There were four tests—above you see an image of the third of those, codenamed George. It occurred today (some sources say yesterday due to the time difference) in 1951.