On this day: October 1

Published On: Sep 30 2012 09:26:47 PM CDT   Updated On: Oct 01 2015 01:00:00 AM CDT

Thomas Edison opens the world's first electric lamp factory, Yosemite becomes a national park, soccer great Pele says goodbye, and Walt Disney World opens, all on this day.

OTD October 1 - David Letterman
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CBS Television

2009: After a former CBS producer was charged in a blackmail plot against him, "Late Show" host David Letterman acknowledges on-air during a taping of the show that he had had sexual relationships with some female staffers.

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