Aerial refueling craft was eventually modified by Airspeed to Cobham's specification, for a non-stop flight from London to India, using in-flight refueling to extend the plane's flight duration. Meanwhile, in 1929, a group of U.S. Army Air Corps fliers, led by then Major Carl Spaatz, set an endurance record of over 150 hours with the "Question Mark" over Los Angeles. Between June 11 and July 4, 1930, the brothers John, Kenneth, Albert, and Walter Hunter set a new record of 553 hours 40 minutes over Chicago using two Stinson SM-1 Detroiters as refueler and receiver. Aerial refueling remained a very dangerous process
History of the US Army National Guard separate from the United States Army, of which it had been part since before World War I. As a result of the Air Force's creation, the Air National Guard was formed. Under the control of the governors during peacetime, the Air Guard was organized along the same lines as the Army National Guard, as both a militia existing in each of the states, and as a federal reserve component of the US Air Force. The fielding of the Air National Guard also caused the creation of two new positions within the National Guard Bureau, the Director of the Army National