On this day: January 10

Published On: Jan 09 2013 12:35:09 PM CST   Updated On: Jan 10 2016 11:59:00 PM CST

Caesar crosses the Rubicon, the London Underground opens, RCA introduces the 45 rpm single, The Beatles' first U.S. record is released, and Wendy's asks "Where's the Beef?," all on this day.

OTD January 10 - Where's the Beef
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1984: The "Fluffy Bun" commercial for the Wendy's fast-foot chain, featuring actress Clara Peller (right) asking "Where's the Beef?," airs for the first time. The catchphrase caught on, inspiring sequel ads, promotional items and even a hit novelty single.

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