Read more about today's security challenges and the defence capabilities NATO is developing to tackle them such as missile defence or Alliance Ground Surveillance.
Learn more about how NATO works with a network of 40 non-member countries as well as other organisations to promote security and tackle shared challenges.
See how 30 countries work together through a relatively small number of structures that interact on a daily basis and are bound together by the principle of consensus decision-making.
Discover other areas in which NATO is involved such as disarmament, arms control and non-proliferation, energy security, climate change, science, gender and human security.