United States of America

The United States of America—also referred to as the United States, the U.S., the USA, America (more loosely), and the States (colloquially)—is a federal republic of 50 states, located primarily in central North America. The country is the world's only Super-Power and has land borders with Canada and Mexico, and territorial water boundaries with Canada, Russia and the Bahamas. It is otherwise bounded by the Pacific Ocean, the Bering Sea, the Arctic Ocean, the Atlantic Ocean, the Gulf of Mexico, and the Caribbean Sea.

The country has been the target of many terrorists and, although most terrorist attempts have been stopped, there have been several sucessful attacks such as the Septemebr 11th Terrorist Attacks, the Nuclear Weapon Attack, the Cordilla Virus release, the abduction of Secretary of Defense James Heller, the meltdown of a nuclear power station and the destruction of Air Force One.

All these events have lead to tough new sucurity measures across the country and the created of several new organisations such as the Counter Terrorism Unit.

The Wikipedia Article for the United States of America can be found here.