They’d fly it again, if they had the chance. Among the group gathered at Delaware’s Dover Air Force Base, there’s a man for every crew station at the ready. They flew, maintained, navigated, and sometimes cursed one of the least understood aircraft in the history of the U.S. Air Force, the Douglas C-133 Cargomaster. In a conference room at Dover’s Air Mobility Command Museum, papers are shuffled—Where was that article from the base news? Smudgy documents, their margins trailing off the page from copy-of-a-copy-of-a-copy Xeroxing, are offered. A small stack of VHS tapes forms a centerpiece. The men, some slowed...