tour building. this is about one man, donald trump. and the big question is will trump insult the u.n. or will he try to make friends. reporter: trump a real estate mogul has not always embraced the u.n. nearly five yearsing being a go, he tweeted the cheap 12 inch marble tiles always bothered me. i will replace with beautiful large marble slabs if they ask me. no one asked despite years of renovation at the u.n. after his election, trump said the u.n. was a club where people like to talk. welcome to the white house. reporter: trump was monday conciliatory when members of the u.n. security council visited the white house in april. i have long felt the united nations is an underperformer, but has tremendous potential. reporter: president trump will speak to the entire world on for the first time from here at the general as secacceptly