Which nation has threatened world security in recent years because of its interest in becoming a nuclear power?

North Korea

North Korea (Democratic People's Republic of Korea, DPRK) is a country in East Asia. It is considered a socialist state, in which the means of production are owned by the state and most services are state-funded. The North Korea government has also been accused of human rights violations by international organizations.

North Korea is no longer a party to the Treaty on the Non-Proliferation of Nuclear Weapons. The country has a military nuclear weapons program and also chemical and biological weapons. This has caused concern all over the world, as it places a significant threat to world security.

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the effect of the ming leaders banning ships with more than two masts was that there was no further construction of ships masts, because there was a surplus. ming emperors disallowed foreign exploration