Testing, one, two, three Published Dec. 18, 2002 OPERATION ENDURING FREEDOM (AFPN) -- Tech. Sgt. Alexander Kokovidis, a laboratory technician assigned to the 819/219 Expeditionary Red Horse Squadron's materials testing lab, tests an asphalt sample Dec. 17 at a forward-deployed location in support of Operation Enduring Freedom. Kokovidis is conducting a specific gravity test by agitation and is removing air from the sample with a vacuum. The materials testing lab ensures contractors meet stringent specifications when doing work at the location. (Photo by Staff Sgt. Tony R. Tolley)