![North Korea's leader Kim Jong-un.](/web/20170424033801im_/http://www.smh.com.au/content/dam/images/g/v/l/h/y/1/image.related.wideLandscape.460x259.gvqpxh.png/1492982675884.jpg)
North Korean threats will leave alliance countries little choice
Australia normally doesn't need an excuse to join in wars with the Americans. But North Korean dictator Kim Jong-un has just given us the best one there is: survival. Self defence is the most basic sovereign obligation a nation has.