 He kept control of the program using a management tool that he devised for himself—a looseleaf notebook, more than a hundred pages in length, that would be put together for him every week summarizing all of the important developments that had taken place and decisions that needed to be made.Presented with the notebook on Thursday evenings, Shea would study and annotate it over the weekend and return to work with new questions, instructions, and decisions.This idiosyncratic tool allowed him to keep tabs on a complex and ever-expanding program.