Strategic Bombing by the United States in World War II

The United States relied heavily on bombing to defeat the Germans and the Japanese in World War II, and air raids were touted as "precision" bombing in American propaganda. But was precision possible over cloud-covered Europe or a darkened Japanese countryside? Could the vaunted Norden optical bombsight in fact "drop bombs into pickle barrels" as advertised? Were the American aircrews well trained and well protected? How good were their airplanes? What were the results of the costly raids? This