Ukraine. >> the u.s. and nato delivered written responses to russia addressing the demands moscow made last week. >> it's not a formal negotiating document. it's not explicit proposals. it lays out the areas and some ideas of how we can, together, if they are serious, advance collective security. >> jeffrey is a former cia military analyst. he served as the director for russia on the national security council. good to see you. the secretary there laid out everything these documents are not. they are also nothing new. the answers, the suggestions, russia has already heard. what's the significan...