Footprints in the sand Published Jan. 23, 2003 OPERATION ENDURING FREEDOM (AFPN) -- Tech. Sgt. Brian Welch tracks elevation measurements using a global positioning system on the flightline at a forward-deployed location as part of an ongoing fuel-farm expansion project. Welch is an engineering assistant with the 380th Expeditionary Civil Engineer Squadron. (Photo by 2nd Lt. Nancy Kuck)