316 SFS Airmen keep POTUS mission secure
Airman 1st Class David Foster, 316th Security Forces Squadron patrolman, directs traffic after stopping vehicles on Perimeter Road near the flightline while President Barack Obama departed Joint Base Andrews, Md., Jan. 28, 2010. 316 SFS members secure the installation when the President of the United States arrives or departs Joint Base Andrews. (US Air Force photo/Chelsea Gitzen)

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