Atlantic City’s police force is stronger thanks to help from an NFL athlete who, for a second time, donated a canine the department intends to use to rid the community of narcotics and other dangers. Fletcher Cox, a long-time defensive lineman for the Philadelphia Eagles, donated “Carlo” to the police force, the second dog he helped the city acquire in support of K9 units in South Jersey. Carlo and his handler on Friday completed training at the Atlantic County John “Sonny” Burke Police K-9 Academy in Corbin City, graduating from a course in narcotics detection, Atlantic City police said Monda…