Mexico City

I took the Inter-terminal train on May 13. You can just show your boarding pass and walk on with no fee. It is mostly standup with a few seats for elderly and people with disabilities. I was bemused to see signs asking people to sit on the seats due to covid, so we stood close together holding the handgrips.

I was supposed to have a same day connection, but the airline messed up on a matter of documentation. The airline acknowledged its error, but by that the flight had left and I had to overnight at the Camino Real.

It is years since I have been to DF. I remembered that the air was thin, but I had forgotten how thin. I am accustomed to doing 8-16 kilometres of brisk walking (eg. 60-80% of maximum heart rate) every day. I was getting exhausted just walking around the airport terminals.