1. What was the stated purpose of the North Atlantic Treaty?

2. What is the relationship between NATO and the United Nations as described in the Treaty?

3. Can NATO expand its membership and welcome new countries into the alliance? Explain.

4. Are Members of NATO allowed to leave NATO? Explain.

5. From a military point of view, why is NATO considered the most important treaty American and Europeans have ever signed? 

6. Since its inception NATO was considered a threat by the Soviet Union and today Russia still considers the NATO alliance to be the greatest threat to the national security of Russia. Why?