United States
The United States of America (USA), commonly known as the United States (U.S.) or America, is a country in North America, a federal republic of 50 states.
United States | History, Map, Flag, & Population | Britannica.com
United States - The World Factbook — Central Intelligence Agency
United States - Simple English Wikipedia
United States of America - Wikitravel
Official U.S. Government Web Portal
About the United States | USAGov