Saturo Nagao, PhD of the Hudson Institute discusses the security alliance that the US has with Japan, India and Australia in the Indo-Pacific region. The Quadrilateral Security Dialogue (QUAD") consists of the US, India, Japan and Australia. It maintains economic and military stability in the indo-pacific region and may be the US and Western Europe's best way to address China's economic and military aggression, as well as the specter of North Korea's burgeoning missile capabilities.