Donald Trump responded to North Korea's latest threats in a typically measured, nuanced fashion: by promising to rain down "fire and fury" on the communist country.
If you feel like you've heard a similar phrase before - well, you have.
People are pointing out that Mr Trump's language sounds eerily similar to that of former US President Harry Truman during the Second World War.
Worryingly, it echoes the aggressive rhetoric Mr Truman used when announcing the US had dropped a nuclear bomb on the Japanese city of Hiroshima, killing 140,000 people. Reassuring...
Here's what Mr Trump said this week:
North Korea best not make any more threats to the United States. They will be met with fire and fury like the world has never seen. He has been very threatening beyond a normal state and as I said they will be met with fire and fury and frankly power the likes of which this world has never seen before.
And here's how Mr Truman threatened further against against Japan in 1945 after announcing the bombing of Hiroshima:
Sixteen hours ago an American airplane dropped one bomb on Hiroshima, an important Japanese Army base. That bomb had more power than 20,000 tons of T.N.T. It had more than two thousand times the blast.
It was to spare the Japanese people from utter destruction that the ultimatum of July 26 was issued at Potsdam. Their leaders promptly rejected that ultimatum. If they do not now accept our terms they may expect a rain of ruin from the air, the like of which has never been seen on this earth. Behind this air attack will follow sea and land forces in such numbers and power as they have not yet seen and with the fighting skill of which they are already well aware.
Let's hope that's the only similarity between the two events.