obama reachssured the gulf countries. he referred to them as free riders in a magazine article. after the meeting, obama said the u.s. will deter and confront aggression against its allies but he's acknowledged disagreements. >> probably the biggest area where there's been tactical differences has been respect to iran. >> he stressed the importance of dialogue to reduce sectarian tensions. >> see them as exacerbating the sectarian tensions with respect to iran. they have been disappointed by what they see. >> saudi arabia and iran back opposing sides in regional conflicts including the civil war in syria. >>> a u.s. -- implementing sanctions on north korea for the launches. experts say officials in pyongyang may soon conduct the country's fifth nuclear test. special envoy for north korea song kim met with his chinese counterpart in beijing. >> the u.s. and china will remain united in our firm opposition to north korea's provocative and irresponsible behavior. and on the importance of implementing u.n. security resolution 2270 fully and faithfully. >> kim also addressed china's ca