How difficult is it to blow up the dam such that the water rushes out? I mean bombing a place to kill people is easy, but I have no idea if you have to hit specific spots on the dam or whether it is enough to just hit any area.
One of the most interesting things IMO was how they used angled lights under the planes - shone onto the surface of the reservoir to make sure they were at the correct altitude to drop the bomb (incorrect height and it wouldn't skip)