New York City police officials intend to expand the already extensive use of surveillance cameras throughout town. The plan, unveiled Thursday, comes as part of a drive for increased security around the US following the Boston Marathon attack. New York City Police Department Commissioner Ray Kelly announced the plan during a press conference with Mayor Michael Bloomberg, in which the two announced that the suspected Boston Marathon bombers were planning to attack New York next. The pair said they hope to discourage criminals by using so-called “smart cameras” that will aggregate data from 911 alerts, arrest records, mapped crime patterns,...