United States of America   President : George W Bush Capital : Washington DC  Land area : 9.8 million sq km (3.8 million sq miles)  Largest City : New York City Population : 300 million (US Census Bureau estimate, 2006)  Major Language : English Major Religion : Christianity  Life expectancy : 75 years (men), 80 years (women) (UN)  Monetary Unit : 1 US dollar = 100 cents  Main exports : Computers and electrical machinery, vehicles, chemical products, food and live animals, military equipment and aircraft  Per Capita income : US $43,740 (World Bank, 2006)  Internet domain :  .us Intl Dialling Code :  +1 Website