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I was surprised to see the wooden benches in the gym. Except for shoring, I can't recall much wood when I was in the US Navy; fire danger.

Interesting that wood is also sometimes used as a heat shield for spacecrafts returning to Earth, fire danger notwithstanding.

Probably high enough up, there is not enough air for it to burn -- and the heat conductivity of wood is really poor.

Plus all that wood paneling on the walls