While successful developments in aviation receive considerable attention, the projects that failed or otherwise did not live up to expectations receive far less, if any, scrutiny. Typically, unsuccessful efforts are briefer in duration and have a less visible paper trail. Thus, while the literature is rich in success stories, we tend to “forget” or simply bury our failures. And, as one observer has suggested, “that there were failures, mistakes, and wrong turns reminds us that progress is ...