Weird Dream

I had a really weird dream last night, which involved an adobe city and people going around with assault rifles, constantly fearing being attacked by snipers. I had bad aim, as it seemed like I was aiming with a mouse and not with my arms. Along the way I saw someone on the rooftops and it was someone from my high school, who also had a gun, and we were both wary of each other even when we recogonized each other. So I moved away carefully and somehow ended up in this base-like place, down aisles that seems like library shelves without books, ending in a slight rectangular depressed room that had this metal net over most of it, as a shield of sorts. It was rectangular and cluttered, with a bunch of other people I recognized but couldn't name now for the life of me. There was a door just opposite from the netted part, and people were going in and out. Then somehow the net fell down, I almost feel was the result of an attack. Then I helped reattach it to the openning, on someones' shoulders. There was a ladder just outside the doorway, and people were going up and down that too. I saw a few people I didn't recognize and thus was suspicious of... and then I think that's when I woke up.