The One World Trade Center opened on the original World Trade Center site.
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The parliament of England passed the first Act of Supremacy, granting the monarch complete control of the Church of England.
NASA launched the last space probe in the Mariner Program, Mariner 10.
Emperor Constantius II was baptized on his deathbed hours before passing.
Political activist and French playwright Olympe de Gouges was guillotined.
Martha Hughes Cannon of Utah became the first elected female State Senator in the United States.
