1980
the Iran–Iraq War begins between Iran and Iraq; Mount St. Helens erupts in Washington, killing 57 people; John Lennon is assassinated in New York City; the 1980 Summer Olympics are held in Moscow amid a widespread boycott led by the United States; the Bologna massacre kills 85 people in Bologna; Operation Eagle Claw fails in Iran during the Iran hostage crisis; the Iranian Embassy siege unfolds in London; the 1980 Irpinia earthquake devastates southern Italy; and the 1980 United States presidential election sees Ronald Reagan defeat Jimmy Carter.
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1980 (MCMLXXX) was a leap year starting on Tuesday of the Gregorian calendar, the 1980th year of the Common Era (CE) and Anno Domini (AD) designations, the 980th year of the 2nd millennium, the 80th year of the 20th century, and the 1st year of the 1980s decade.