It was a time that truth may have slipped out, in an unguarded moment. Fresh from the National Security Briefing which is given to two men- one of whom will become President in a few weeks- and apparently confided to their running mates as well, a nervous Joe Biden approached the microphones. He had presumably heard something which had given him a dry mouth and wet pants, and so felt that the secret must be immediately compromised, in order to show how seriously he takes security. "Mark my words, Barack will be challenged in the next six months. And it...