While I Was Sleeping

There was a hell of a lot of noise outside this morning while I was trying to get to sleep, with sirens and horns blaring and loud equipment of some sort. (That last might have been the garbage truck, I suppose, but seemed to hang around far too long.) Being as I was trying to get to sleep, I just got up and closed the window and eventually it stopped, but now I'm really curious as to what that was all about.