WHYS 30: What's happening in North Korea?

What's happening in North Korea? The head of North Korea's military has been removed from all his official posts 'due to illness'.

In the past few weeks North Korea's young leader Kim Jong-un has been seen with a mystery woman and there are reports of women wearing miniskirts and high heels on the streets of Pyongyang.

What do we know about this nuclear armed nation? Should we be worried about these recent developments or are these signs of North Korea becoming more open?