Calisthenics, a workout routine that has existed for centuries, has seen a major resurgence in recent years – partly due to its simplicity.

Abraham Lincoln issued the "preliminary" Emancipation Proclamation on this day in history, Sept. 22, 1862, announcing the slaves would be freed on Jan. 1, 1863.

Watch in Movie Theaters on August 11th, 1964 - Buy A Hard Day's Night Movie Tickets ...

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