On this day: November 21

Published On: Nov 20 2012 02:35:16 AM CST   Updated On: Nov 21 2016 01:00:00 AM CST

Thomas Edison announces the phonograph, "Frankenstein" terrorizes moviegoers, Tweety Bird makes his debut, and millions tune in to find out "who shot J.R.," all on this day.

OTD November 21 - Nixon tapes
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Gerald R. Ford Library and Museum

1973: U.S. President Richard M. Nixon's attorney, Fred Buzhardt, announces the presence of an 18-and-a-half-minute gap in one of the White House tape recordings related to the Watergate case. In grand jury testimony in 1974, Nixon's secretary, Rose Mary Woods, would admit she accidentally erased five minutes of the tape but insists that she was not responsible for the remaining 13 minutes of static. Here Woods demonstrates how she erased the tape by stretching to simultaneously press controls several feet apart.

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