I have heard (no source, so could be entirely incorrect) that the decision to bomb Japan was made several years before the bomb itself was first constructed. Considering that at this point both Germany and Japan would have been viable targets, what went into this decision-making process? Is it true that it was somewhat racially motivated, as it was easier to garner support to bomb a relatively alien nation, compared to the familiarity with which most of the allied forces (and their leaders) had with the germans?