Portugal and the Dutch Republic signed the Treaty of The Hague.
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Flammable vapor caught fire at the Chevron Refinery in Richmond, California.
Pittsburgh hosted the world's largest pinball tournament.
NASA's Curiosity rover landed on Mars' Aeolis Palus plain.
At just 30 years old, golf professional Tiger Woods won the 50th PGA, making him the youngest person ever to win a PGA.
Jon Stewart hosted his last episode of 'The Daily Show.'
