This is propaganda in action. In fact, if we taught a course specifically on mainstream media propaganda, we'd use this clip from CNN today as a perfect example.
Moscow is denying this and no one at the U.S. State Dept. is confirming it at this time... but look at how they run with it like it's a fact (and even use the word "fact") when this is, by definition, no such thing.
How they can call this "news" with a straight face is their real talent.