This appears to be the authentic Twitter avatar of a man named Alexander Allan, who, as head of Britain's Joint Intelligence Committee, is that nation's spy chief. (The job is analogous to the Director of National Intelligence.) He's lived a fascinating, tragic, and mystery-filled life. And he's a Deadhead, to boot.
Hidden away on Google’s campus, doctors at a world-class life sciences lab are trying to change the way people think about their health.