vladimir putin just made a key move. let s talk about ukraine, what s going on there right now. the u.s. military saying it s seen the very first signs that russia is, in fact, pulling some troops back from the ukrainian border. why would vladimir putin be doing this now? reporter: vladimir putin said he s doing this as an additional step to help create a favorable environment for sunday s presidential elections in ukraine. he doesn t want there to be any doubt, doesn t want to be accused that russia is playing a spoiler-type role. so, russia is going out of its way to be seen to be playing nice. putin describes the election as a positive step. but really, the key reaction from russia will come monday morning, after this election has been held, whether or not russia accepts the result, whether or not russia will see the new president of ukraine as someone that they recognize and can do business with and can negotiate with, because the big challenge in holding this election for ukrain