For a man so in love with the technology of image, the camera, the microphone and the teleprompter, the leader of the increasingly less free world has a natural tendency to put a little too much faith in it. This is the second time that an open microphone has let Obama down, the first time it recorded him stabbing an ally in the back, the second time it recorded him stabbing a few dozen more in the back. Medvedev, whose bosom buddy just managed to cling to power with a stolen election and brutal suppression of protests, surely understands how...