Sources
http://armscontrolnow.files.wordpress.com/2012/05/nato-logo-1328007305.jpg
http://www.state.gov/p/eur/rt/nato/nato2012/about/index.htm
http://news.bbc.co.uk/2/hi/europe/country_profiles/1543000.stm
http://www.nato.int/history/nato-history.html
http://www.history.com/topics/cold-war/formation-of-nato-and-warsaw-pact