public void changeCityOwner(int cityID, Owner newOwner){
    	City c = cityList.changeCityOwner(cityID, newOwner);
    	Iterator<Path> it = pathList.iterator();
    	while(it.hasNext()){
    		Path p = it.next();
    		if(p.containsID(cityID)){
    			p.updateCity(c);
    		}
    	}
    }