Similarly, in the United States a daily rotating pool is set up at the White House for organizations that cover the president.
They are allowed special access to certain events with the understanding that the information and footage will then be shared with the rest of the White House press corps.
For example, the major networks rely on a pool feed of the daily briefing at the State Department for their live coverage, since the press conference is usually only of national interest when there is a significant breaking story relating to international diplomacy.
One prominent example of this was the international broadcast of the state funeral of John F. Kennedy, which involved four major venues and a lengthy procession.
For example, under normal circumstances, the only cameras allowed in the chambers of Congress are those operated by government employees under rules established by congressional leaders.
In the case of television, a pool photographer is expected to turn over all of the material that was recorded rather than keeping certain select shots for his or her own employer.