When it comes to history or journalism, deciding what to include is almost as important as how you cover the subject. What else happened on Dec. 7, 1941, or the day man landed on the moon? Aug. 24, 1921 was one of those days.

The world’s largest dirigible exploded over England as it prepared for a transatlantic flight to Lakehurst, N.J., and a massive fire witnessed by tens of thousands of people broke out on the Hoboken docks, threatening the giant ocean liner Leviathan and over 5,000 American…