BALTIMORE -- Footage from Baltimore Police body cameras and the downtown CitiWatch surveillance network shows groups of youths gathered Saturday night at the Inner Harbor randomly breaking into fights with each other — and at times committing more serious assaults. It shows clusters of kids casually chatting on the promenade around the water, but also sprinting along sidewalks and into traffic. It shows a large group fighting in the middle of Pratt Street, a half-dozen youths attacking a bicyclist on the ground, one teen jumping on the roofs of two cars, and another randomly kicking a passerby in the face...