general john allen, colonel andrew bacevich, sarah sewall, we thank you. >> thanks, judy.. >> woodruff: these american strikes in syria came as president trump, as reported, was hosting the president of china for their first summit. the chief issues: north korea's nuclear and missile programs, and trade between the world's top two economies. john yang reports. >> the relationship developed by president xi and myself, i think, is outstanding. >> reporter: after his first encounter with the man leading the nation he once criticized as a menace, president trump was full of praise. >> president xi and all of his representatives have been really interesting to be with. i think we have made tremendous progress in our relationship with china. >> reporter: white house officials said the goal of the seaside summit was to establish a basis for future relations. >> ( translated ): this bilateral meeting is a thoughtful and ingenious arrangement. it is an important and meaningful development in the u.s.-china relationship. i believe that with the passage of time, we will make efforts