Related Clues:
- It began in H.S.T.'s administration
- 19-nation gp.
- Alliance headquartered in D.C.
- Grp. that includes the U.S.
- Alliance created in '48
- Warsaw Pact's Cold War opponent
- Pan-Amer. Union outgrowth
- New World alliance (Abbr.)
- Defense org.
- Grp. that outlasted the Warsaw Pact
- Alliance founded in 1949
- W. Hemisphere group
- Western treaty gp.
- Peace-keeping org.
- Peacekeeping gp.