Some useful information of United States of America(USA):
Capital: Washington, D.C.
Area: 98,26,675 Sq.km.
Population: 314 millions (Approximately)
Currency: United States Dollar (USD)
Dialing code: 1
President: Barack Obama (44th President of the United States) U.S. Govt. , The White House
List of States in USA: California, Texas, Florida, New York, Pennsylvania, Virginia, Illinois, Georgia, Michigan, Arizona, Washington, Ohio, Oregon, Maryland, Missouri, New Jersey, Nevada, North Carolina, Connecticut, Wisconsin, Indiana, Iowa, Mississippi, Massachusetts, Colorado, Tennessee, Idaho, Delaware, Utah, Arkansas, Hawaii, Kansas, South Carolina, Louisiana, New Hampshire, Nebraska, Oklahoma, Rhode Island, Alabama, Maine, Alaska, Kentucky, Minnesota, Montana, New Mexico, North Dakota, South Dakota, Vermont, West Virginia, Wyoming, District of Columbia