The One World Trade Center opened on the original World Trade Center site.
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Emperor Constantius II was baptized on his deathbed hours before passing.
The International Radiotelegraph Conference in Berlin selected 'SOS' (· · · – – – · · ·) as the global standard for radio distress calls.
Explorer Christopher Columbus, on his second voyage, found Dominica and the Kalinago people.
The Soviet Union sent a dog into space aboard the spacecraft Sputnik II.
Political activist and French playwright Olympe de Gouges was guillotined.
