Editing Closed-circuit television (section)

=== Networking CCTV cameras ===
The city of [[Chicago]] operates a networked video surveillance system which combines CCTV video feeds of government agencies with those of the private sector, installed in city buses, businesses, public schools, subway stations, housing projects, etc.<ref>{{cite web|title=The City of Chicago's OEMC and IBM Launch Advanced Video Surveillance System|url=http://www-03.ibm.com/press/us/en/pressrelease/22385.wss|archive-url=https://web.archive.org/web/20090524151923/http://www-03.ibm.com/press/us/en/pressrelease/22385.wss|url-status=dead|archive-date=24 May 2009|website=IBM News Room}}</ref> Even homeowners are able to contribute footage. It is estimated to incorporate the video feeds of a total of 15,000 cameras.<ref>{{Cite news|url=https://www.wsj.com/articles/SB10001424052748704538404574539910412824756|title=Chicago's Camera Network Is Everywhere|author=William M. Bulkeley|newspaper=Wall Street Journal}}</ref> The system is used by Chicago's [[Office of Emergency Management]] in case of an emergency call: it detects the caller's location and instantly displays the real-time video feed of the nearest security camera to the operator, not requiring any user intervention. While the system is far too vast to allow complete real-time monitoring, it stores the video data for use as evidence in criminal cases.<ref>"[https://www.wsj.com/articles/SB10001424052748704538404574539910412824756 Chicago's Camera Network Is Everywhere]", The Wall Street Journal</ref>