Christian hit a half century a couple of days ago. He got his PhD from a tier one university at 23 and now works at the pure research laboratory of an elite university on the East Coast. We are quite proud of him. It is a hard age, but he is navigating it well. In a few weeks I will be able to announce another accomplishment for him and for me. He is helping me with my retirement PhD effort and, believe it or not, with my day job.