The instantly recognizable silhouette of a B-2 Spirit flies overhead at Andersen Air Force Base, Guam. The first flight of the B-2 took place 25 years ago on July 17, 1989. The Air Force Research Laboratory's investment in technologies like integrated avionics, radar and low-observables maintainability helped field the B-2. (U.S. Air Force photo/Airman 1st Class Michael S. Dorus)