Afghanistan, March 15, 2010: Petty Officer 3rd Class Brice Roberts, 24, swings a pickaxe while Petty Officer 3rd Class Alexander Taylor, 24, holds back the metal lathe for the concrete floor at the construction site of a new tactical operations center at Forward Operating Base Sharana in Paktika province. The construction by the Naval Mobile Construction Battalion 4 was part of a massive building effort to support the surge in troops ordered in December 2009 by President Barack Obama.

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