Did the United States have a plan in place for the possibility of one or both of the atomic bombs dropped on Japan not detonating?

by only_personal_thungs
rocketsocks

Not discouraging other answers, but here's an old answer from /u/restricteddata on exactly that: https://www.reddit.com/r/AskHistorians/comments/acnnl3/if_the_atomic_bomb_on_hiroshima_or_nagasaki_had/ed9odyl/