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>> stay vigilant to areas you are in. >> with isis and other terror groups calling for attacks and after high profile string of arrests, departments are on alert. >> we try to be very visible. >> from san diego to wichita, kansas and new york city. theyre asking for individual lens from the community too. at the same time they say fear shouldnt outweigh fun on the fourth. >> police say wherever you are, if you see something out of the ordinary, go ahead and report it. >> never be too cautious. t...