Staff Sgt. Samuel Parker, 36th Operations Support Squadron air traffic controller, and Tech. Sgt. Jason Trickey, 36th OSS NCO-in-charge of air traffic control training and standardization, demonstrate how air traffic controllers use binoculars to determine whether an aircraft’s landing gear is down or not at Andersen Air Force Base, Guam, May 6, 2010. Air traffic controllers work closely with other 36th OSS flights to ensure pilots are permitted to take off and land aircraft safely. (U.S. Air Force photo/Senior Airman Shane Dunaway)