Now that was LOL funny.
Nagasaki was hit with a Plutonium bomb.
About 99% of all nuclear weapons today are Plutonium. Only N. Korea and **maybe** Pakistan have their nukes from U-235.
Plutonium does not require months or years of centrifuge activity. It is likely N. Korea will transition their weapons to Plutonium soon, since they have a power reactor. As does Iran. Spent fuel rods are the plutonium source.
(It largely doesn’t matter if the centrifuges were destroyed)