On June 4, 1989, hundreds, perhaps thousands, of pro-democracy demonstrators and dozens of soldiers are estimated to have been killed when Chinese troops crushed a seven-week protest held by occupying demonstrators in Beijing's Tiananmen Square.

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In 1792, during the French Revolution, mobs in Paris attacked the Tuileries Palace, where King Louis XVI resided. (The king was later arrested…

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In 1783, the Montgolfier brothers first publicly demonstrated their hot-air balloon, which did not carry any passengers, over Annonay, France.