Anders Fogh Rasmussen welcoming Anatoly Serdyukov, left, in Brussels. BRUSSELS — NATO and Russia clashed again over the alliance’s plan to build a missile defense system, but NATO’s leader said he was optimistic that the two sides could iron out their differences in time for a summit next May. NATO Secretary-General Anders Fogh Rasmussen said the military alliance and Russia “are coming closer to reaching agreement” […]