An aerial view of Northwest Field, Andersen Air Force Base, Guam. Northwest Field is an important historical, cultural and ecological resource for Andersen. In addition to a historical airfield used for training, it is the location of the largest limestone forest on Guam, the natural habitat for several endangered bird species. Andersen works closely with local wildlife agencies to protect these resources and balance the need for training with a solid record of environmental stewardship in the area. (U.S. Air Force courtesy photo).