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In short, we know what happened. That evidence is already in.

The real question is: Are we going to do anything about it beyond hectoring Mr. Putin for access to a crime scene?

What happened July 17 was indeed a crime, and that aspect should be handled in due course.

But it was also the product of a cynical, irresponsible, high-risk, inevitably deadly policy choice made by a head of state. Unless we are willing to endure more of the same, Vladimir Vladimirovich needs to understand that such actions have real and costly policy consequences.

The evidence needed to act on that is already well in hand.

• Gen. Michael Hayden is a former director of the CIA and the National Security Agency. He can be reached at