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WJLA, November 21, 2012

Throwback Thursday: A look back at Nov. 18-25 in history

The Gettysburg Address, a major question in TV history and an American tragedy in Dallas are all included in this week's ABC7 Throwback Thursday.

Nov. 23, 1923: Three-light traffic signal patented

Nearly a century later, getting people to obey them is still a work in progress.

(Photo: Wikimedia Commons/Associated Press) of fullscreen mode

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