Following the war, the Bell Aircraft Plant #6 remained closed for five years. In 1951, Lockheed Aircraft Corporation took over the plant to modify B-29s for the Korean War. Lockheed also went on to build 394 B-47 Stratojets at the plant under license from Boeing. Additionally, Lockheed also conducted a B-47 modification program at Marietta. To handle the B-47 production and modification work, the airfield received a 10,000 × runway. Over the years, the Lockheed plant constructed the Lockheed JetStar business jet (C-140), C-130 Hercules, C-141 Starlifter, and C-5 Galaxy.