Related Clues:
- Grp. that has added 12 members since the end of the Cold War
- Defense alliance since 1949, for short
- Alliance HQ'd in Brussels
- Multi-national defense org
- Alliance that keeps a wary eye on Russia
- International 30-Across
- Missile-detection org
- Multi-country defense group
- Partnership for Peace international gp
- Air defense org
- What’s spread evenly among UN: parts of alliance
- Alliance recently joined by Montenegro
- European defense grp
- Group with a secy.-gen
- Defense org. in Brussels