While most attention on NORAD and North American defence cooperation is focused on the modernization of the North Warning System (NWS), significant developments have occurred that suggest modernization will be accompanied by significant evolutionary changes to the Command. The new threat environment, centered upon Russian behaviour in Crimea, Ukraine and Syria, a new Russian strategic doctrine, and a new generation of advanced Russian long-range cruise missiles dictate not only layered, multi-sensor early warning system, but also changes in NORAD command arrangements. In addition, the maritime component of the cruise missile threat, alongside continuing concerns of terrorists employing freighters as cruise missile platforms, raise the question whether NORAD should evolve into a binational air-maritime defence command.