Okay, so I try to keep up on what's happening in the world for a number of reasons which would paint me as a conspiracy theorist (or worse).
Here's the article I just finished reading about the U.S. claiming Russia is shelling Ukrainian military positions.
Now, if this is true, then it's also true that the entire rebel uprising in Ukraine is likely a direct result of Russian influence. If it's not true, it's likely that the U.S. is undertaking a serious effort to paint Russia as a backer of terrorist activity. Both of those implications are staggering in the long-term outlook of international relations.
I tend to think that governments need to create conflict in order to maintain power, increase control, and stimulate economies--history bears this out. This isn't the post to get into the creation of the Taliban, but you're free to search and find out that US involvement created that group and subsequently paved the way for their terrorist activities (both past and present).
What possible reasons would the US have for implicating Russia, whether it's true or false? Perhaps another Cold War is just what the Uncle ordered? After all, it would be a fantastic way to increase spending and military presence in that part of the world where China is also an emerging power. On the flipside, Russia may be a bit sandy about the previous Cold War and harbor a desire to return to their once-mighty status on the world stage.
...or the powers-that-be (talking globally here) are moving pieces into place for some disturbing game of geo-political nightmarish war--but that's a story for another time.