Question Mark (aircraft) Question Mark (aircraft) Question Mark (""?"") was a modified Atlantic-Fokker C-2A transport airplane of the United States Army Air Corps. In 1929, commanded by Major Carl A. Spaatz, it was flown for a flight endurance record as part of an experiment with aerial refueling. "Question Mark" established new world records in aviation for sustained flight (heavier-than-air), refueled flight, sustained flight (lighter-than-air), and distance between January 1 and January 7, 1929, in a non-stop flight of more than 150 hours near Los Angeles, California. Following the record-setting demonstration, the C-2A was returned to transport duties. In 1931 more powerful engines replaced
North Carolina Highway 150 150 and NC 18 split. NC 150 heads due west to Boiling Springs, where the route turns due south across the Broad River to end at the South Carolina state line. SC 150 continues south across the line toward I-85 again and Gaffney, South Carolina. NC 150 was designated around 1929 as a spur route from the first NC 15, which is now mostly part of US 29. Its first routing ran west from Salisbury to Mooresville. By 1931, the route was extended through Lincolnton to US 74 in Shelby. The highway previously linking Lincolnton and Shelby was designated as