It was the summer before my high school senior year. I was working for The School Dept. I and two of my fellow workers were taken to the nearby Air Force Base to sweep out a hanger. The base had been downsized a few years earlier and the hanger had been declared surplus. The Air Force let the school dept use it for a warehouse. When we got there, we got a nasty surprise. The building had been vacant for 5 years and though the main doors were closed,the tail door wasn't fully closed. Hanger 22 had become pigeon heaven! There was 5 year worth of pigeon dung, dead birds, fallen nests and broken eggs on the floor. The main door was now open and an 18 wheeler was inside waiting to be unloaded. They tried to move the rig outside so we could sweep that area first. Unfortunately, all it did was spin its wheels. It was almost like being stuck in the snow. (I wouldn't want to be hit with one of those "snowballs". We started sweeping and got nowhere real fast. After an hour , the boss came over and told us to stop. He said that it could be unhealthy to be breathing in all the crap that was in the air. Nobody argued with him. They brought in two of the city's street sweepers to replace us.I was told that it took them the whole afternoon. Twenty years later, fate would have it that I would have this hanger on my route. It was occupied by a rigging company that I delivered to just about every day. He was a neat freak and he had that hanger shining. You could eat off the floor - but no thanks.