Air Force Staff Sgt. Pashala Lewis, foreground, maintains tension on a rope while, left to right, Senior Airman Elliott Oh, Tech. Sgt. Michael Fannaly, and Airman 1st Class Chester Johnson tie down two other retention ropes while lifting the first rib of a large maintenance structure on Bagram Airfield, Afghanistan, Feb. 12, 2016. Lewis, Oh, Fannaly and Johnson are assigned to the 455th Expeditionary Civil Engineer Squadron. Air Force photo by Capt. Bryan Bouchard