Paul McCartney, I can attest, is alive and quite well. At least, he was Friday night at Nationals Park in Washington, D.C. The Resident Nurse is still singing. She woke me one night to tell me Sir Paul would be appearing in Washington. Should she get tickets? she asked. From somewhere the other side of total awareness, I must have at least not discouraged the idea. She woke me a short time later. She had tickets and a hotel reservation….