it's not about signing contracts or anything else but they believe this meeting is worth it. what they want, they say, is more predictability, more stability in the relations, and they certainly want to get a sense from washington and also telegraph their sense of where their red lines are and where the u.s.'s red lines are, so right now, this is really shaping up to be a meeting between two leaders who obviously don't necessarily like each other very much but who are very, very focused on the task at hand, who are focused on their own national interests and really want to get down to business here and at the very least, know where the other side stands and move forward from there, guys. >> fred pleitgen, phil mattingly, thank you both. let's bring in jim sciutto from geneva. and jill dougherty. jim, let me start with you. it's hard to recognize failure when success hasn't been defined. the president dodged a really important question at that news conference yesterday. so, how will we know?