Although North Korea's recent missile test is unlikely to have been an ICBM, they are likely to have a medium range missile that could hit South Korea in a few years.
Should Australia seek a ballistic missile defence capability, like that of the United States?
US Department of Defense
North Korea does not yet have the capacity to launch a nuclear missile from a submarine. Its recent test, however, suggests it is making progress to a game-changing second-strike capability.
Director, Nautilus Institute, Professor of International Relations and Honorary Professor at the Centre for International Security Studies, University of Sydney