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Baseball's Opening Day is postponed because of Martin Luther King assassination
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1st Baseball game in Canada - Mont Expos beats New York Mets 10-9
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Frank Robinson debuts as 1st black baseball manager (Cleveland, beats New York 5-3)
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Oakland A's stadium becomes 1st outdoor arena to ban smoking
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"5 Guys Named Moe" opens at Eugene O'Neill Theater New York City for 445 performances
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Smoking banned in Pentagon and all U.S. military bases
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Microsoft Corp releases Internet Explorer 4.0
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65th Golf Masters Championship:
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One hour before the deadline, the U.S. Congress reaches a deal on the 2011 U.S. federal budget, avoiding a government shutdown
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Microsoft ends support for its Windows XP operating system; the system was first released in 2001