NATO's 30 member states, along with partner countries in the Asia-Pacific, Australia, New Zealand, Japan, and South Korea, will gather in Madrid, Spain, for an important summit. On the agenda will be discussions about how to deal with Russia's ongoing aggression toward Ukraine, NATO's responsibility for Europe's defense, and China's expanding influence in the Pacific. Former Deputy Secretary General of NATO Rose Gottemoeller analyzes the summit's significance and implications for future policy.