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
Parking Non-Stop as a recording project, Parking Non-Stop have played live several times during their lifetime, often in collaboration with like-minded musicians, poets and artists. Performances to date have taken place in several European countries, including Wales, England, Ireland, Slovakia, Bosnia, Germany, Czech Republic, Norway, Romania and France. In addition to producing music and sound collage, Parking Non-Stop also make films, which are used as projections during their live performances. These films tend to be very slow moving and uneventful in order to enhance, rather than detract from the sound. Some examples can be viewed on the group's YouTube channel (see external