it s also double the cost. it costs about $3,000 to be installed on just one street corner. video surveillance in the u.s. is a $10 billion business. that number soared in the years after 9/11 which saw 30 million new cameras added to the streets. the tragedies have an impact on our industry. we re very concerned. we don t want to be perceived as opportunistic. from real ones to dummyies to the inconspicuous, to those monitored by humans. millions of cameras watch over the u.s. as part of the roughly $60 billion spent annually on domestic security but can we afford it sdm. this definitely is a time of fiscal austerity. and how much should cost be a factor in american safety. in london the suspects behind the railway bombings in 2005 were identified by name in just a few days. that s because the city has roughly one camera for every 14 people. a total of half a million.