But as I began to describe to McFarland what we had learned about the “left of launch” program, and how it was being used against North Korea, I could see by the look on her face that it seemed to be the first she had heard of it. That was surprising: If there was anything that the new national-security team needed to get up to speed on quickly, it was the full range of American efforts to defang the North Korean threat. Perhaps she was just a good poker player, but the discussion did not suggest the new administration had a full grasp of what it was about to face.