Not as of 2018, but when they put a satellite into orbit they will have missiles with the range and payload capabilities needed to deliver nuclear warheads anywhere on earth.
The U.S. has thousands of nuclear weapons. It could probably turn the entire world, to say nothing of North Korea, into a nuclear wasteland if it felt like it.
Well north korea already has nuclear weapons, they tested one in late 2012, and the US responded with strict UN sanctions. But the nuclear weapons obtained by the DPRK are very small (around 4 nuclear weapons) and it can only reach to the southern part of Japan so nuclear war seems unlikely at the moment. But they may always use it as a force of diplomatic aggression to force outcomes.
North Korea is not going to take over the world. It's a tiny country with mostly outdated technology. North Korea does, however, possess nuclear weapons, which could cause a great deal of damage if they were ever used. While the country occasionally threatens to use its nuclear weapons, it probably won't anytime soon.
Nuclear weapons created stand-offs. A stand-off is a cold war. Possibly, but North Korea doen't have well technology (nuclear power). Their missles could only hit Hawaii if, they don't get shot down by our Patriot System SAM's. Than think America has nuclear powered submarines that carry 18 nuclear warheads in the hull of the sub. If North Korea shoots a nuclear warhead at us. Then our subs would fire their nuclear warheads at NK. On top of that our subs could get really close to the North Koreans cities. Then the North Koreans missles either wouldn't hit or they would get shot down.
By the time of the Korean War, the Soviet Union had nuclear weapons and was allied with China and North Korea. Using a nuclear weapon there could have triggered a nuclear war between the US and the USSR.
North Korea, Iran, and possibly Syria. North Korea has confirmed it has the capabilities to create nuclear weapons and has proven it. However, they have not perfected the technology behind delivering the missile effectively to anywhere outside the Korean Peninsula. Iran claims its current nuclear program is for peaceful purposes. But the claim is practically ludicrous with the evidence behind the type of reactors being built, the fissile material being generated, and the statements it has made about Israel. Syria is another story because it has attempted to create nuclear reactors as well with evidence that it received help from North Korea. However, Israel destroyed the site before it could be operational.
then America's screwed. =D It is unlikely, and if it happens there are many different scenarios, including the one written above, but it is not the only one. War with North Korea might also mean war with China, as it was in the early 1950's. North Korea and China have their own nuclear weapons now, with no need for support from Russia. It could be bad.
It depends where they were looking. They could find many nuclear weapons in North Dakota, for example.
The main effect is a lower standard of living as the country is spending money that could be used for food on bombs plus the effects of external trade embargoes.
Conceivably, yes. Although the Cold War is over, North Korea has ties with Red China and Iran. Such a war would likely involve many other countries and nuclear weapons.
General MacArthur wanted nothing short of total war. He proposed to conquer North Korea, then push into China and use Nuclear Weapons to subdue resistance. This would have very likely drawn the USSR into the war, and could have escalated into a nuclear exchange.
There are several Asian countries that could be considered secretive and who use nuclear power. For instance, there are North Korea and China.