Doordarshan (abbreviated as DD; distant vision, television) is an Indian public service broadcaster founded by the Government of India, owned by the Ministry of Information and Broadcasting and one of Prasar Bharati's two divisions. As one of India's largest broadcasting organisations in studio and transmitter infrastructure, it was established on 15 September 1959. Doordarshan, which also broadcasts on digital terrestrial transmitters, provides television, radio, online and mobile service throughout metropolitan and regional India and overseas. The channel began modestly as an experimental broadcaster in Delhi on 15 September 1959, with a small transmitter and a makeshift studio. Regular daily transmission started in 1965 as part of All India Radio, with a five-minute news bulletin read by Pratima Puri. Salma Sultan joined Doordarshan in 1967, and became a news anchor. Krishi Darshan debuted on Doordarshan on 26 January 1967, and is Indian television's longest running program. Television service was extended to Bombay (now Mumbai) and Amritsar in 1972. Until 1975 only seven Indian cities had television service, and Doordarshan was the country's sole television provider. Television service was separated from radio on 1 April 1976. The All India Radio and Doordarshan were placed under the management of separate directors-general in New Delhi. In 1982, Doordarshan became a national broadcaster. National telecasts (DD National) was introduced in 1982. Colour television began in India with the live telecast of the Independence Day speech by Prime Minister Indira Gandhi on 15 August of that year, followed by the colour telecast of the 1982 Asian Games in Delhi. Two years later, Doordarshan as a TV network finally took shape: the then sole TV channel was split into the nationally aired DD-1 and city channel DD-2, later rebranded in 1993 as DD National and DD Metro. Live telecasts of the opening and closing ceremonies of the 2012 Summer Olympics were broadcast on its national channel, and DD Sports provided round-the-clock coverage.