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Security Line
A Marine assigned to Battalion Landing Team 1/4, 13th Marine Expeditionary Unit, stands security during a training evolution, Dec. 14, 2013. The 13th MEU is deployed with the Boxer Amphibious Ready Group as a theater reserve and crisis response force throughout the U.S. 5th Fleet area of responsibility.
(U.S. Marine Corps photo by Sgt. Jennifer Pirante/RELEASED). Original public domain image from Flickr
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