The Chain Gun And You

We've set up chain guns and barricades directly to the east and to the west. Our injured soldiers are hiding in both rooms - trying their best to not alert the mindless ghouls to their presence.$B$BNow that we have ammo, I need you to man one of the chain guns and use it to blast a path clear for our soldiers! Once you're on board, call a soldier out from hiding and then lay down heavy fire to keep the Scourge off him!$B$BGet a move on!