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
Christgau's Record Guide: The '80s process of reviewing 20 records per month for the column, Christgau told the "Chicago Tribune" in 1990 that he had developed into a "processor" of music, with 12 to 14 hours of his day usually spent listening to albums: This book collects approximately 3,000 "Consumer Guide" reviews which range individually from 50 to 150 words—accompanied by a letter grade—and are arranged as entries, ordered alphabetically by the name of the album's recording artist, and annotated with year of release and record label. The styles of music covered throughout the collection include rock, pop, country, blues, jazz, hip hop, metal, punk