NATO is often trumpeted as the most successful military Alliance in human history: a grand claim indeed. The reality is less definitive. NATO did not win the Cold War alone nor has it had military success in every campaign; it was not responsible for the end of piracy off Somalia and the training missions in the Middle East did not deliver what was promised. The Alliance can be disfunctional, self-serving, and procedural inept too. Yet it has also delivered the underpinnings of peace and security for 75 years to member states. What has made it successful and what has undermined the other bits? Peter talks to Professor Julian Lindley-French about political leadership and strategy, the failure of advice, the inability to implement plans, and the European problem of only recognising as much threat (to national security) as you can afford.