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For North Korea, which has conducted six nuclear tests over the years in the face of severe economic sanctions and international reprobation — and consequently has a far more advanced nuclear program than Iran — many analysts say the lesson from Sunday is clear: A working nuclear deterrent is the only guarantor of security.

But it set the country on a collision path with Western nations - economic sanctions followed, companies exited and the economy collapsed.

Second, Ukraine's western allies also want a tough new package of economic sanctions.

The US wants Iran to stop enriching uranium, which can be used to create a nuclear bomb, in exchange for easing economic sanctions.

Trump abandoned the agreement during his first term in 2018, saying it did too little to stop a pathway to a bomb, and reinstated crippling economic sanctions to force Iran to renegotiate.