[publius911]

But I think a movie theatre is a good idea if you have a large library at the time you have to enter your bunker.

Not a whisper of the Achiles heels of the entire enterprise.

Assured supply of water and oxygen. Ventilation; waste disposal. Power for lighting and temperature control.

Automatic machine guns?

[Jonty30]

I was also thinking, as I was typing it, that watching movies under this condition could put you at risk of being detected or it could interfere with your ability to hear any possible intruders.