More strategy for the tactical team:
When your foe is cornered in a ferroconcrete building and doesn’t seem to be negotiating..
a) Call in a robot with a hand grenade and send it in to negotiate for you.
b) Wait for the situation to develop. Even Sun Tzu had to sleep and eat. The word you are looking for is “seige” or – if you’ve got kids – “time out.”
c) You must go on the offensive immediately, since they might tunnel out and escape.