by David R. Henderson [Editor’s note: The following is an encore presentation of David R. Henderson’s column of July 31, 2006.] Sometimes, something happens that is so awful that we find ourselves rationalizing it, talking as if it had to happen, to make ourselves feel better about the horrible event. For many people, I believe, President Truman’s dropping the atomic bomb on Hiroshima on Aug. 6, 1945, and on Nagasaki on Aug. 9, 1945, were two such events. After all, if the leader of arguably the freest country in the world decided…