On this day: April 9

Published On: Apr 06 2013 12:22:11 AM CDT   Updated On: Apr 09 2016 01:00:00 AM CDT

General Lee surrenders at Appomattox Court House, NASA picks its first seven astronauts, the Houston Astrodome opens, and Iraqis tear down Saddam Hussein's statue in a liberated Baghdad, all on this day.

OTD April 9 - Boeing 737
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1967: The first Boeing 737 makes its maiden flight. The 737, which has been continuously manufactured by Boeing since then, has since become the best-selling jet airliner in aviation history, with 7,865 delivered and more than another 3,680 orders yet to be fulfilled as of the end of 2013.

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