13 arrests were made Friday at residences in Denville, Dover, Randolph, Rockaway, Victory Gardens and Wharton, as part of Gov. Jon S. Corzine's Strategy for Safe Streets and Neighborhoods, a statewide initiative targeting criminal street gangs. More than 100 officers from 18 agencies participated in the 6 a.m. bust, which was the third phase of an "aggressive mission to cripple street gangs' command structure by taking down leaders and high-ranking associates," county Prosecutor Robert A. Bianchi said during a news conference Monday afternoon.Since August, Morris authorities have arrested 32 individuals from Morris and Essex counties on 286 charges, and seized $1.35 million in cocaine and heroin and 33 firearms, including assault rifles and high-powered weapons."It's a hit-them-when-they-are-down philosophy. We used a variety of undercover infiltration methods, changing things up like a boxer so they did not become accustomed to our methods of operation,...