In 1980, the United States led a 61-nation boycott of the summer Olympics held in Moscow that year. U.S. President Jimmy Carter called for the boycott to protest the Soviet invasion of Afghanistan in December 1979. But well before the invasion of Afghanistan, before the Iranian hostage crisis involving 52 American hostages, before the oil shock that sent oil prices to historic highs in 1979-80, Carter’s presidency was in shambles.
http://middleeast.about.com/od/afghanistan/a/me080803.htm
http://middleeast.about.com/od/afghanistan/a/me080803.htm