Question: Which 6.8 mi tributary empties into the Potomac River at the Marine Corps Base Quantico's Air Station near Triangle, Virginia?
Sentence (from "Marine Corps Air-Ground Museum"): It housed a wide variety of historic Marine Corps vehicles/tanks (both wheeled and tracked), equipment, artillery pieces and aircraft (both fixed wing (airplanes) and rotary wing (helicopters)) to trace the evolution and significance of the Marine Air-Ground Team.
Relevant evidence: No