on mobile devices, and some also offer email notification of stories. In addition to the English service, 18 of the language services broadcast a radio service using the short wave, AM or FM bands. These are also available to listen live or can be listened to later (usually for seven days) over the Internet and, in the case of seven language services, can be downloaded as podcasts. News is also available from the BBC News 'app', which is available from both iTunes and the Google Play Store. In recent years, video content has also been used by the World Service: 16 language services show video reports on the website, and the Arabic and Persian services have their own television channels. TV is also used to broadcast the radio service, with local cable and satellite operators providing the English network (and occasionally some local language services) free to air. The English service is also available on digital radio in the UK and Europe. Traditionally, the Service relied on shortwave broadcasts, because of their ability to overcome barriers of censorship, distance, and spectrum scarcity. The BBC has maintained a worldwide network of shortwave relay stations since the 1940s, mainly in former British colonies. These cross-border broadcasts have also been used in special circumstances for emergency messages to British subjects abroad, such as the advice to evacuate Jordan during the Black September incidents of September 1970. These facilities were privatised in 1997 as Merlin Communications, and later acquired and operated as part of a wider network for multiple broadcasters by VT Communications (now part of Babcock International Group). It is also common for BBC programmes to air on Voice of America or ORF transmitters, while their programming is relayed by a station located inside the UK. However, since the 1980s, satellite distribution has made it possible for local stations to relay BBC programmes. BBC World Service is not regulated by Ofcom. as the BBC generally is. Instead the BBC is responsible for editorial independence and setting strategic direction. It defines the remit, scope, annual budget and main commitments of the World Service, and agrees "objectives, targets and priorities" with the British Foreign Secretary in a document named the BBC World Service Licence. The Chair of the BBC Board and the Foreign Secretary (or representatives) meet at least annually to review performance against these objectives, priorities and targets. Funding The World Service was funded