there is a hidden police staion inside is a nuclear boimb you have a switch to activate it u have to go into the room with the people from the secret services in the room u take survivors in pres red button and if u want watch on tha roof it is a special bomb witch has pesticides in it killing the Zombeez (flying bees spreading the virus if u kill em it explodes every zombies head around u within a 10 meter radius) so if u kill all tha bees u kill all tha zombiez if u have any questions about the location please post