A U.S. Army CH-47 Chinook carrying soldiers assigned to 1st Cavalry Division prepares to land at Contingency Operating Site Kalsu July 30, 2011. 1st Cavalry Division is replacing 3rd Armored Cavalry Regiment as the dominate unit in Kalsu.  (Photo by: Spc. Nathan Franco)
<br>Unit: Joint Combat Camera Center Iraq
Nathan Franco
Taken on 30 July 2011
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