Considering that N. Korea is Iran's Pathway to a Nuclear Weapon (from another article**), I'd say we should be very worried, especially with the "nuke deal" Barry just made.
North Korea warns U.S. it's ready to use nuclear weapons 'any time (CNN)In its latest bout of saber rattling, North Korea says it is ready to use nuclear weapons against the United States and other foes if they pursue "their reckless hostile policy" toward Kim Jong Un's regime.
In a statement carried by the North's state-run Korean Central News Agency on Tuesday, an atomic energy official said Pyongyang is improving its nuclear weapons arsenal "in quality and quantity."
"If the U.S. and other hostile forces persistently seek their reckless hostile policy towards the DPRK and behave mischievously, the DPRK is fully ready to cope with them with nuclear weapons any time," the director of the North Korean Atomic Energy Institute said, using an abbreviation of the country's official name, the Democratic People's Republic of Korea.
North Korea's main nuclear complex at Yongbyon, which includes a uranium enrichment plant and a plutonium production reactor, is operating normally, the official told the news agency....
http://www.cnn.com/2015/09/15/asia/north-korea-nuclear-program/index.html**
http://www.nationalinterest.org/feature/north-korea-irans-pathway-nuclear-weapon-13570
