At just 30 years old, golf professional Tiger Woods won the 50th PGA, making him the youngest person ever to win a PGA.
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Portugal and the Dutch Republic signed the Treaty of The Hague.
NASA's Curiosity rover landed on Mars' Aeolis Palus plain.
Jon Stewart hosted his last episode of 'The Daily Show.'
Flammable vapor caught fire at the Chevron Refinery in Richmond, California.
A team of NASA scientists declared that the Martian ALH 84001 meteorite might contain traces of alien life.