On ongoing theme. Any stamp that commemorates space exploration. This does not include sci-fi related stamps.
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Letter Rate 10¢ Package Rate 10¢ Postcard Rate 8¢ United States 6/30/1974 Mikhail Baryshnikov Defects to the US Mikhail Baryshnikov, considered one of the world’s greatest ballet dancers, defected from the USSR. He defected in Canada and got political assylum there. He was granted asylum in the US soon after. American President Richard Nixon (1/20/1969-8/9/1974) Argentine President Juan Perón (10/12/1973-7/1/1974) Australian Prime Minister Gough Whitlam (12/5/1972-11/11/1975) Austrian President Bruno Kreisky (4/1/1974-7/8/1974) Bahamian Premier Lynden Pindling (5/10/1969-8/21/1992) Bahamian Prime Minister Lynden Pindling (5/10/1969-8/21/1992) Belgian Prime Minister Leo Tindemans (4/25/1974-10/20/1978) Brazilian President Ernesto Geisel (3/15/1974-3/14/1979) British Prime Minister Harold Wilson (3/4/1974-4/5/1976) Canadian Prime Minister Pierre Trudeau (4/20/1968-6/3/1979) East German Chairman of the State Council Willi Stoph (10/3/1973-10/29/1976) German President Gustav Heinemann (7/1/1969-6/30/1974) Japanese Prime Minister Kakuei Tanaka (7/7/1972-12/9/1974)