BUS

This is one of the things which NATO claims was a mistake. It was at about this time when NATO realised that President Milosevic was not going to give up Kosovo, and they realised that their bombing campaign wasn't doing any damage to the Yugoslav Army. Because NATO and the US could not loose this war (as that would make them look bad) they started to target civilians and every time ti was a "mistake".

So the only conclusion that i can come up with is that NATO must be really stupid or they bombed civilians deliberately.