North Korea missile test: What happens next?

US Vice President Mike Pence has slammed North Korea's latest missile test launch as "destabilising and threatening behaviour".

Even though the launch failed the mere act of attempting one has ramped up tensions even further.

Will the US launch a pre-emptive strike?  And if they did - how would North Korea respond? 

University of Auckland Asia studies expert Steve Noakes spoke to Duncan Garner.   

Watch the video for the full interview.