I find it much harder to work long hours, now that I’m older. I typically put in 13-14 hour days, up to 16 sometimes. That can be very difficult on your body and your brain. But 25 years ago, some of my days were up to 32 hours (duty day waived during period of war time), and even though we had opportunities to take naps, I rarely was able to sleep. Something to do with the fact that our sleeping facilities had four beds, and the other three were filled with snoring, farting, loadmasters and flight engineers. 