Gallucci emphasized an important point. Regime change madness (my word, not his) by both Bush2 and Obama has the North Korean dictator convinced that he has to have powerful weapons to stop that from happening to him.
It's a sobering thought. With all the chaos the US and our allies have fermented around the world, a lot of Chess pieces have been moved and there are unintended consequences. Perhaps one of them is that countries such as North Korea and Pakistan have legitimate concerns that the US is way too fond of toppling governments, and they have to be able to defend themselves.
North Korea is probably just the beginning.