brent: our washington bureau chief alexandra von nahmen has more from the white house. andra: this meeting today between the south korean president and u.s. president donald trump was actually meant to find a joint strategy for dealing with the north korean leader during this planned summit. now it seems to have become more of a crisis session. it is really remarkable that president trump for the very first time has admitted that this summit may not take place on june 12, that it may be delayed. and we have to understand that, we have to remind ourselves what happened last week. the white house was caught off-guard when north koreans fired off a string of inflammatory statements against the u.s., condemning the latest u.s. south korean military drills in the region, saying that they are not going to participate in a meeting with south koreans, and then threatening to cancel the planned summit with donald trump. and since then, we have to say that trump's advisors have become increasingly skeptical that kim jong-un is really committed to pledges to seriously discuss denuc