An unmanned aerial system flies over Camp Bullis, Texas, during a field test Sept. 4, 2019. The UAS was equipped with Light Detection and Ranging, multi-spectral sensors and machine-learning algorithms to map, survey and inventory habitat for the golden-cheeked warbler. The field test will help the Air Force determine if UAS technology can characterize habitat better, faster and cheaper than current methods. (U.S. Air Force photo by Malcolm McClendon)