Query: When was the 50th anniversary of BBC news broadcasts?
Context: On 5 July 2004, the BBC celebrated the fiftieth anniversary of its television news bulletins (although it had produced the Television Newsreel for several years before 1954). This event was marked by the release of a DVD, which showed highlights of the BBC's television coverage of significant events over the half-century, as well as changes in the format of the BBC television news; from the newsreel format of the first BBC Television News bulletins, to the 24-hour, worldwide news coverage available in 2004.