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July 25, 2014

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In this Thursday, Feb. 6, 2014 photo, food technologist Tom Yang cuts a prototype pizza at the U.S. Army Natick Soldier Research, Development and Engineering Center, in Natick, Mass.

AP Photo/Steven Senne

In this Thursday, Feb. 6, 2014 photo, food technologist Tom Yang cuts a prototype pizza at the U.S. Army Natick Soldier Research, Development and Engineering Center, in Natick, Mass.