KANDAHAR AIRFIELD, Afghanistan - U.S. Navy Yeoman 1st Class Tiffany Norwood attached to Naval Mobile Construction Battalion (NMCB) 28, receives the mandatory annual flu vaccination Oct. 12, 2013. NMCB 28 is based out of Barksdale Air Force Base, Shreveport, La., and is currently deployed to Afghanistan in support of Operation Enduring Freedom. (U.S. Navy photo by Mass Communication Specialist 1st Class John Banfield/Released).