UAVs are used by all four military branches for missions ranging from reconnaissance and surveillance to attack; and each branch is represented in this exhibit: Predator, DarkStar, X-45A (Air Force); Shadow 200 (Army); Dragon Eye (Marine Corps); and Pioneer (Navy). Likewise, a wide variety of technologies are on display: jets, piston-driven props and electric motors for propulsion; and surveillance radars, precision bombs and missiles for combat use.