| 1893 |  | 
                    | 1896 | 
                                
                                    | 3.24.1896 A. A. Popov makes the first radio signal transmission in history. |  | 
                    | 1897 |  | 
                    | 1901 |  | 
                    | 1906 | 
                                
                                    | 12.24.1906 Radio: Reginald Fessenden transmits the first radio broadcast; consisting of a poetry reading, a violin solo, and a speech.   |  | 
                    | 1908 | 
                                
                                    | 1.12.1908 A long-distance radio message is sent from the Eiffel Tower  for the first time. |  | 
                    | 1920 | 
                                
                                    | 7.25.1920 Telecommunications: the first transatlantic two-way radio broadcast takes place.   |  
                                
                                    | 8.20.1920 The first commercial radio station, 8MK (WWJ), begins operations in Detroit, Michigan . |  | 
                    | 1922 |  | 
                    | 1923 | 
                                
                                    | 12.31.1923 The chimes of Big Ben are broadcast on radio for the first time by the BBC . |  | 
                    | 1924 |  | 
                    | 1926 | 
                                
                                    | 11.15.1926 The NBC  radio network opens with 24 stations.   |  | 
                    | 1927 | 
                                
                                    | 12.10.1927 The Grand Ole Opry premieres on radio. |  | 
                    | 1936 | 
                                
                                    | 2.29.1936 Baby Snooks, played by Fanny Brice, debuts on the radio program  ''The Ziegfeld Follies of the Air''.    |  | 
                    | 1947 | 
                                
                                    | 2.17.1947 The Voice of America begins transmitting radio broadcasts to the Soviet Union . |  | 
                    | 1948 | 
                                
                                    | 8.10.1948 ''Candid Camera'' makes its television  debut after being on radio for a year as ''Candid Microphone''.   |  | 
                    | 1955 | 
                                
                                    | 6.7.1955 Lux Radio Theater signs off the air permanently. The show launched in New York  in 1934, and featured radio adaptations of Broadway  shows and popular films. |  | 
                    | 1969 | 
                                
                                    | 11.3.1969 Vietnam War: U.S. President Richard M. Nixon addresses the nation on television  and radio, asking the "silent majority" to join him in solidarity on the Vietnam War effort and to support his policies. |  | 
                    | 1970 | 
                                
                                    | 4.1.1970 President Richard Nixon  signs the Public Health Cigarette Smoking Act into law, requiring the Surgeon General 's warnings on tobacco products and banning cigarette advertisements on television  and radio in the United States , starting on January 1, 1971. |  | 
                    | 1978 |  | 
                    | 1987 |  | 
                    | 1994 | 
                                
                                    | 10.12.1994 NASA loses radio contact with the Magellan spacecraft as the probe descends into the thick atmosphere of Venus  (the spacecraft presumably burned up in the atmosphere). |  |