A wide variety. The coastal plain of the Atlantic seaboard gives way further inland to deciduous forests and the rolling hills. The Appalachian Mountains divide the eastern seaboard from the Great Lakes and the grasslands of the Midwest. The Mississippi –Missouri River, the world's fourth longest river system, runs mainly north–south through the heart of the country. The flat, fertile prairie of the Great Plains stretches to the west, interrupted by a highland region.
The United States, with its large size and geographic variety, includes most climate types.
The United States has a very diverse population with 31 ancestry groups. White Americans are the largest racial group; German American, Irish Americans, and English Americans constitute three of the country's four largest ancestry groups. Black Americans are the nation's largest racial minority and third largest ancestry group. Asian Americans are the country's second largest racial minority.
Christianity is by far the most common religion practiced in the U.S., but other religions are followed too. The First Amendment of the U.S. Constitution guarantees the free exercise of religion and forbids Congress from passing laws respecting its establishment.
The United States has a capitalist mixed economy, which is fueled by abundant natural resources, a well-developed infrastructure, and high productivity.
Americans have the highest average household and employee income among OECD nations.
The United States is the world's oldest surviving federation. It is a constitutional republic and representative democracy, "in which majority rule is tempered by minority rights protected by law ". The government is regulated by a system of checks and balances defined by the U.S. Constitution, which serves as the country's supreme legal document.
US Military Presence/Support
RELATIONSHIP WITH THE U.K. (:37)
North Atlantic Treaty Organization (NATO) (1:07)