North Korea has nukes and WMD and therefore we we will NEVER threaten to attack it, NEVER pressure it with war talk, NEVER humiliate its leadership and WILL NOT attack it at will. We will even allow it to finish deliveries on scud missiles we seize on the high seas to Yemen.
This sends a very clear message heard round the world; If you do not have nukes and WMD the USA will treat you like Yugoslavia and Iraq if you develop nukes and WMD (and the ability to deliver them) in time you will be treated with distance and respect like we treat Pakistan, and North Korea.
That is why I know Iraq does not have online nukes (chemical and bio weapons are 19th century technology so it is very possible the Iraqis can make and use them with little difficulty) at the moment because we are bullying Iraq around at will UNLIKE how we are treating North Korea.