KZN (later to become KSL) first goes on the air on Saturday afternoon, 3:00 pm from a one-room tin shack atop the News building (later called the Union Pacific Building) with Flash Wilson as announcer. Church President Heber J. Grant, in dedication of station, reads on the air a quotation from Doctrine & Covenants 76, a passage on the mission of Jesus of Nazareth. Broadcast reportedly heard 1,000 miles in every direction. This inaugural program marks the beginning of radio broadcasting in the Mountain West, ―the first full time commercial broadcasting operation between the Mississippi Valley and the Pacific Coast.
[Source: Sherry Baker: Mormon Media History Timeline: 1827-2007, http://byustudies.byu.edu/showTitle.aspx?title=7984]