Related Clues:
- U.S.-Canada mil. defense system
- Org. that tracks Santa
- Grp. that outlasted the Warsaw Pact
- Alliance founded in 1949
- Peace-keeping org.
- Peacekeeping gp.
- Alliance since '49
- Brussels-based gp.
- ___ forces
- Post-WWII grp.
- Iceland is part of it: Abbr.
- Port. is part of it
- Alliance headquartered in Brussels
- Intl. defense alliance
- Treaty acronym