PETERSON AIR FORCE BASE, Colo. – Part of the equipment required for Doug Eckberg, United States Department of Agriculture Animal and Plant Health Inspection Service wildlife biologist, to do his job are air guns and air pellets, which he uses to shoot birds that are too close in proximity to the flight line at Peterson Air Force Base, Colorado and the Colorado Springs Airport. Eckberg has to keep the flight line safe for aircraft, the pilots and passengers. Damage to aircraft can cost thousands of dollars to repair. (U.S. Air Force photo by Audrey Jensen)