Screen Shot 2016-12-29 at 17.30.37 Published on December 29, 2016 in 29 July 1938, 04:11 GCTFull resolution (1562 × 1192) ← Previous Next → The first Martin M-130, NCxxx14, undergoing ground testing at the Glenn L. Martin Co. plant at Middle River, Maryland, 30 November 1934. (Lockheed Martin)