Construction workers prepare pipes for the new Wilford Hall Ambulatory Surgical Center energy plant on Joint Base San Antonio-Lackland, Texas, Aug. 28, 2012. The energy plant is part of the first phase, which includes a 1,000 car parking garage and the "A" wing of the new WHASC. The state-of-the-art medical facility is projected to be completed in 2015. (U.S. Air Force photo/Senior Airman Kevin Iinuma)