P-38: How A Tiny Can Opener Changed The World 

It looks like just a small piece of junk, but the P-38 can opener is a marvel of engineering. Built for soldiers in World War II, the P-38 and larger P-51 can openers continue to serve today. Chef and food writer Matt Degen tells the history of the P-38, how to use it, and why one can can be vital even today.
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Further reading: U.S. Army article on P-38 can opener
www.army.mil/a...