MCCONNELL AIR FORCE BASE, Kan. -- Senior Airman John Durden, 22nd Civil Engineer Squadron, instructs a group of Airmen on how to create an L-shaped corner for a sandbag wall at the hardening/dispersal area, Jan. 16. Airman Durden also reviewed blackout methods, dispersal sites and expedient hardening. (Photo by Airman 1st Class Maria Ruiz)
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