Leader Kim Jong Un again defies a UN Security Council prohibition.
India conducted a successful fourth flight test of its Agni-5 ballistic missile, a nuclear-capable system likely to reach intercontinental-ballistic-missile classification.
The UN Security Council quickly condemned a missile test, but moves slowly on new sanctions in response to September nuclear test.
Asian states Pakistan, India, China, and North Korea comprise four of the world's nine nuclear-armed states. The interconnections of these countries must be considered to fully understand how nuclear nonproliferation can be influenced.
A new study suggests that President Obama, failed to make progress in key nuclear disarmament areas during his second term.