Magnificent Desolation by Buzz Aldrin

Magnificent Desolation: The Long Journey Home from the Moon by Buzz Aldrin with Kim Abraham

Page 33:

Millions of people on Earth listened in to the static-filled radio transmissions between Mission Control in Houston and us as we descended. Some of our transmissions were barely distinguishable. That was one problem we had not anticipated in our hundreds of hours of working in the simulator back on Earth — it hadn’t really occurred to us that we wouldn’t be able to hear instructions from Mission control, but we were catching enough to stay focused and keep going.