Eamon de Valera publicly repudiated the Anglo-Irish Treaty.
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US President Ronald Reagan and Soviet leader Mikhail Gorbachev signed a treaty eliminating medium-range nuclear missiles.
Frank Sinatra Jr. was kidnapped.
Metallica became the first band to have performed on all seven continents when they held a concert in Antarctica.
Sophie's Choice, directed by Alan J. Pakula, was released.
SpaceX became the first private company to launch, orbit, and recover a spacecraft.
