On this day: March 21

Published On: Mar 18 2013 01:38:04 PM CDT   Updated On: Mar 21 2016 01:00:00 AM CDT

Alcatraz prison closes, Martin Luther King Jr. marches toward Montgomery, the U.S. decides to boycott Moscow's Olympics, and Spielberg nabs his first Oscar, all on this day.

OTD March 21 - Rudolf Christoph von Gersdorff
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German Federal Archive/Wikimedia Commons

1943: Wehrmacht officer Rudolf von Gersdorff plots to assassinate Adolf Hitler by using a suicide bomb, but the plan falls through when Hitler's planned 30-minute visit to a military museum in Berlin is cut short as a security precaution. Von Gersdorff was able to defuse the bomb in time and avoid suspicion.

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