User blog comment:Koveras Alvane/The Beauty of Mass Effect 2 Ending/@comment-4707281-20130423152213/@comment-184.4.96.63-20130424033442

The turret section shows that the FOB is not isolated away from the enemy. You know what else shows this. The opening scene of hammer landing at the fob, when you get to see the alliance shooting husks,cannibals,and ravengers. This clearly shows the fob isn't isolated. Another reason on why the turret section wasn't needed, is you have about 10 marines spread around between the room garrus is in to the room anderson is in. More than enough to handle a handful of husks and a few cannibals.