In this special encounter, you'll find a Brotherhood bunker with a pair of guards out front, and a lot of dead civilians around them. The guards will say things like "Last time they complain, right?" and "Civilian pukes," but they start out neutral to you, and so killing them might cost you rank and reputation (that didn't happen in our game, but other people have reported it). If you want to, you can rob the guards for 1800 7.62mm ammunition, and, if you kill them, you can grab their vindicator miniguns.