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Nuclear Weapons of the Atomic AgeMexico, 1977One airmail stamp commemorating the 10th Anniversary of the Treaty of Tlatelolco (Treaty for the Prohibition of Nuclear Weapons in Latin America and the Caribbean), depicting a skeleton in the style of Leonardo Da Vinci%u2019s Vitruvian Man superimposed over a nuclear blast. Issued on February 14.Nicaragua, 1971One stamp, from a set of five commemorating physical laws and mathematical formulas, depicting a nuclear blast and featuring Einstein%u2019s formula E-mc2. Issued on May 15.Aitutaki, 1980Miniature Sheet with six stamps commemorating the 25th Anniversary of the death of Albert Einstein (1879-1955), with two stamps depicting nuclear blasts. Issued on July 21.