of television since the early 2010s. Technological innovations The first national live television broadcast in the U.S. took place on September 4, 1951, when President Harry Truman's speech at the Japanese Peace Treaty Conference in San Francisco was transmitted over AT&T's transcontinental cable and microwave radio relay system to broadcast stations in local markets."Television Highlights", The Washington Post, September 4, 1951, p. B13. The first live coast-to-coast commercial television broadcast in the U.S. took place on November 18, 1951, during the premiere of CBS's See It Now, which showed a split-screen view of the Brooklyn Bridge in New York City and the Golden Gate Bridge in San Francisco. The Eurovision Song Contest held yearly from 1956 by the European Broadcasting Union was launched, among other goals, with the aim to make technical improvements in the field of simultaneous sharing of TV signals across main national European broadcasters, a technical challenge by that time. It is the longest-running annual international televised music competition. In 1958, the CBC completed the longest television network in the world, from Sydney, Nova Scotia to Victoria, British Columbia. Reportedly, the first continuous live broadcast of a "breaking" news story in the world was conducted by the CBC during the Springhill mining disaster, which began on October 23, 1958. The development of cable television and satellite television in the 1970s allowed for more channels and encouraged companies to target programming toward specific audiences. It also enabled the rise of subscription television channels, such as Home Box Office (HBO) and Showtime in the U.S., and Sky Television in the U.K. Television pioneers Important people in the development and contributions of TV technology. Manfred von Ardenne John Logie Baird Alan Blumlein Walter Bruch (PAL television) Guillermo González Camarena Alan Archibald Campbell-Swinton Karl Ferdinand Braun Allen B. DuMont Philo T. Farnsworth Boris Grabovsky Charles Francis Jenkins Siegmund and David Loewe, founders of Loewe AG in 1923 Earl Muntz Paul Gottlieb Nipkow Constantin Perskyi Boris Rosing Ulises Armand Sanabria David Sarnoff Isaac Shoenberg Kenjiro Takayanagi Léon Theremin Kálmán Tihanyi Vladimir Zworykin Television museums Museums focused on or exhibiting television history. Paley Center for Media (New York City, New York, United States) Early Television Museum (Hilliard, Ohio, United States) Museum of Broadcast Communications (Chicago, Illinois, United States) National Science and Media Museum (Bradford, West Yorkshire, United Kingdom) National Museum of Australia (Acton, Australian Capital Territory) See also The Interviews: An Oral History