But what I would say to my successor is that it is important not just to shoot but to aim. And it is important, in this seat, to make sure that you're making your best judgments based on data, intelligence, the information that's coming from your commanders and folks on the ground and you're not being swayed by politics.
When looking at the brain, it is important to go beyond its structure to its function. This is because often in cognitive disorders, the structure of the brain is intact, but its function is compromised.