Related Clues:

• 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.
• Grp. formed in Bogotá