 I'm John Dutch with Sam Gwynne. His exciting new book, Though You Understand, this is his majesty's airship, the life and tragic death of the world's largest flying machine. R101 will go down in France. However, there are decisions made here that have defied analysis all these years since, except Sam has an analysis that makes sense, and it's as up-to-date as anything that existed in 1930 when they mourned the crash.