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.
The Clifton Suspension Bridge was finally opened.
Abraham Lincoln issued his Amnesty Proclamation and plan for the Reconstruction of the South.
Dwight D. Eisenhower gave his 'Atoms for Peace' speech at the United Nations in New York.
NASA's Galileo spacecraft made its first flyby of Earth.
