Tech. Sgt. Michael Martin, 386th Expeditionary Civil Engineer Squadron heavy equipment operator, uses a trowel to flatten minor ridges and holes, as well as the embed aggregate particles in concrete at an undisclosed location in Southwest Asia, Sept. 8, 2017. This process brings a smoother "cream" consistency to the concrete surface for a final finish. (U.S. Air Force photo by Tech. Sgt. Jonathan Hehnly)