Bunkers with multiple exits

We believe that having multiple exits on bunkers especially community bunkers in Tornado prone areas can be valuable. Bunker exit can get blocked by debris blown by a Tornado, alternate exits can provide people inside the bunkers access and they should be able to come out of the bunkers after a storm.

This idea was from 11 year old kids who participated in a First Lego League challenge to come up with innovative solutions for disaster recovery.