i can't believe anyone for a moment pretends to be puzzled about who killed boris nemstov. a former us ambassador to ukraine this morning on cnn: 'we will never know' what happened. then he makes it completely obvious that he has no doubt whatever that it was vlad the impaler. like what is the strategy there? what percentage is there in saying you've got no idea and then making it obvious that you are completely certain? well, whatever mealy-mouthed diplomats might think they're accomplishing, there is just no other even vaguely plausible scenario.