melissa bell joins me live from warsaw with the latest. remind us why the wording of donald trump's speech is just so critical. >> well, because as you were just reminding viewers, hannah, this is really all about nato. you really need only to look at the geography of poland, to look at its 20th century history to understand why perhaps for this country, more than any other in europe, the idea of that famous article 5 clause within the nato trea treaty, which essentially means when one country is under attack, the others come to help it, you can understand why it matters more here than it does in many other countries. we are hear in warsaw, after all, only 300 kilometers from the russian border. as you alluded to, donald trump has not been terribly forth coming in his support, in his clear recommitment to that article 5 clause, failing to mention it at all when he was at