to arrive, let's talk about the big stakes ahead of this meeting. nicholas burns, former ambassador to nato under president george b. push. ron brownstein, cnn senior political analyst and senior editor at "the atlantic," as well as jackie kucinich, our political analyst and washington bureau chief for "the daily beast." as we wait for the president, let me begin with you, ambassador dalla. the president will speak shortly and you say this is a chance to reset the record. to do that, what does he need to say? >> well, he needs to say that the united states values nato and everything that it stands for, including in particular article five, which s the commitment to regard an attack against one as an attack against all, and that the united states is unconditionally standing behind its commitment to defend whoever is attacked. and secondly, to be very clear that today, the major challenge to security in europe and to