...
Right after the group met with David and the other three, everyone quickly reorganized themselves and started moving. They were heading to the exit as fast as possible since they all knew that this base would be swarming with more mutated humans that were coming from the outside.
David and his group just rushed here since they have to rescue these guys before the whole base was filled by those mutated experimental subjects. After all, it was going to be very troublesome once they were stuck here due to those.
During their travel, David asked the others about the situation within the base to understand the overall situation. He also had to inform John about their discoveries while the latter reported to the higher-ups.