A rookie cop - the son of a highly respected New York City detective - has been stripped of his badge and gun after being caught on video viciously attacking a bicyclist who was part of a Times Square demonstration. ' The startling YouTube video shows Officer Patrick Pogan, 22, apparently setting his sights on - and then tackling - a bicyclist as he pedaled along Seventh Avenue as part of last Friday's controversial Critical Mass ride. Christopher Long, 29, was among a throng of riders as he whizzed toward the corner of West 46th Street at 9:30 p.m. and...