The year 1946 saw a number of significant events in radio broadcasting history. Events 20 January – British composer Sir Granville Bantock writes to fellow composer Rutland Boughton, criticising the BBC Music Department's attitude towards some newer composers. 15 July – The Elizalde brothers together with Bertrand Silen, establish Metropolitan Broadcasting Corporation, and at the same time KZRH returns to the air, broadcasting from the Insular Building, Binondo, Manila, Philippines. 1 September – The Norwegian Radio Orchestra (Kringkastingsorkestret) is founded. 5 September – In Berlin Rundfunk im amerikanischen Sektor (RIAS, "Broadcasting in the American Sector") begins mediumwave transmissions. The station, established by the US occupation authorities, had begun its activities on 7 February as the wire-broadcasting service DIAS (Drahtfunk im amerikanischen Sektor). 29 September – The BBC Third Programme is launched in the UK as a cultural channel. 3 November – In Italy, RAI reorganizes its stations into two new national networks, the Rete Rossa and the Rete Azzurra. 31 December – BBC General Forces Programme closed down. Bush DAC90 bakelite radio introduced in the United Kingdom: it becomes the best-selling model for some years. Debuts 7 January – The Second Mrs. Burton daytime serial debuts on CBS. 21 January The Fat Man (radio) debuts on ABC. I Deal in Crime debuts on ABC. 2 February – Twenty Questions debuts on Mutual. 4 March – Bob Elson on Board the Century debuts on Mutual. 24 March – BBC Home Service radio in the United Kingdom broadcasts Alistair Cooke's first American Letter. As Letter from America, this programme will continue until a few weeks before Cooke's death in 2004. 30 March – Academy Award Theater debuts on CBS. 2 April – Ed Sullivan's Pipelines debuts on the Blue Network. 21 April – The Amazing Mrs. Danberry debuts on CBS. 29 April – Forever Ernest debuts on CBS. 3 June – Winner Take All debuts on CBS. 12 June – Author Meets the Critics debuts on Mutual. 27 June – By Popular Demand debuts on Mutual. 5 July – Hawk Durango debuts on CBS. 12 July – The Adventures of Sam Spade, Detective debuts on ABC. 18 August – Danger, Dr. Danfield debuts on ABC 3 September – The Cresta Blanca Hollywood Players debuts on CBS. 8 September – The Bickersons debuts on NBC. 18 September – The Ford Show debuts on CBS. 29 September – Are These Our Children? debuts on