Marines killed in Nevada explosion identified

Associated Press
This undated photo provided by the U.S. Marines shows Pfc. Joshua M. Martino of Clearfield, Pa. Martino, 19, was killed with six other Marines in an explosion during a Nevada training exercise on Monday, March 18, 2013. (AP Photo/U.S. Marines)

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The seven Marines killed in a training exercise explosion in Nevada this week ranged in age from 19 to 26, most of them veterans of the war in Afghanistan.

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