jiefshgs big cities are learning strategy. in houston squads go out and serve warrants and in philadelphia, police have a foot patrol presence. and in los angeles, la pd cut the murder rate through the gang fighting strategies. y we have learned that it is not just policing. you have to have wrap around strategies that keep kids from going in gangs and address the ones that are, in a none punitive matter and keeping the peace and reducing the violence. reporter: the name of the game is prevention. discouraging crime before it starts, harris? brian, thank you. 67 people died in the upscale shopping mall by terrorist in kenia. new details came out about whether any of the attackers are on the loose. on the white house on the defensive by a new book by