Races are conducted on closed circuit tracks. This was the first flight over a closed circuit. The production was telecast on closed circuit television that year. Homer watches him panic on a closed circuit TV. The gas mixture is controlled by the diver in manually controlled closed circuit rebreathers. There are two kinds of SCBA&colon; open circuit and closed circuit. Rallycross cars are used for racing on closed circuit arenas at "high speeds". Some supporters watched McCain's speech via closed circuit TV from the ballroom. The blood thus makes a complete closed circuit. This action was later released as a closed circuit video presentation. Turnstiles at the tram entrances and closed circuit television prevent fare evasion by passengers. Surveillance cameras used in the home are IP cameras or closed circuit. The same year she appeared in the political thriller "Closed Circuit" (2013). Hempstead Wright also had a supporting role in the 2013 crime thriller "Closed Circuit". He was examined by a mental health review team, and monitored by closed circuit television.