. >> officer christian jeffreys walks the beat in camden's fairview neighbourhood. >> all done for the summer? >> good. >> he's one of 400 officers on patrol in america's dangerous city. in 2013 camden dismantled its police department, bringing in blood. the orders - engage in real community policing. more boots on the ground. 8-hour patrol shifts on foot. making making arrests like this more common. how does walking this square decrease crime? >> if i was in a vehicle i wouldn't spend much time in it. like it's been done before, prior to the camden police department changing over. >> reporter: since the reforms, square. >> we know who lives here, who doesn't. we see the same people in here playing with the kids. >> reporter: the city introduced a state of the art surveillance system. more than 100 live streaming cameras monitored 24 hours a day. we have something that the camera. >> reporter: orlando, the new assistant police chief, says the cameras are not only helping solve crimes hike this shooting in 2014, but police are using them to predict crimes. what is known as the broken wi

jeffrey brown has our conversation. >> brown: the u.s. remains an overwhelmingly christian country. that hasn't changed, but a new survey shows a significant drop in the number of americans who identify as christian. the survey was done by the pew research center. it showed that in 2007, 78% of americans identified as christian. by last year, the percentage had dropped to under 71%. those years have seen a dramatic rise in the number of americans who say they are religiously unaffiliated, from 16 to nearly 23%. the largest drop was in mainline protestant denominations, but the number of catholics also fell. several non-christian religions, islam and hinduism, saw modest gains. alan cooperman is director of religious research at pew. also with us is reverend serene jones president of the union theological seminary in new york city. welcome to both of you. alan cooperman, let me start with you. one aspect of this that might surprise people is just how widespread this drop is. did that strike you? >> absolutely, jeff. i mean, i think the important thing for people the realize, this is