Bill Gates left the Microsoft board after founding the company four decades prior.
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Marvel's 'Captain America: The Winter Soldier' premiered in Los Angeles.
Itza, the last Mayan kingdom, was conquered by Spanish forces.
Apollo 9 and its crew returned to Earth after a 10-day mission orbiting Earth.
The US army enlisted its first female colonel, Julia Flikke.
Pope Leo XII renewed the prohibition of members of the Catholic Church from joining the Freemasons.
