| http://www.w3.org/ns/prov#value | - 500 getting a second look. >> i think the event in boston yesterday will raise once again the consciousness that there is a reason, there is a need for the extra security that they encounter. >> reporter: since 9/11, there is been a dramatic increase in the use of security cameras. today an influential republican called for even more. >> out on the street, there is not an expectation of privacy. >>
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