| − | The United States of AMERICA is a BIG DOG STATION. | + | The United States has land borders with [[Canada]] and [[Mexico]], as well as several 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. Two of the fifty states, [[Alaska]], an exclave, and [[Hawaii]], an archipelago, are not contiguous with any of the other states. Alaska in located in northwest North America and the Hawaiian Islands in the Pacific Ocean. The United States also has a collection of overseas territories and possessions around the world. Each of the 50 states has a high level of local autonomy under the federal system. |
| | + | American military, economic, cultural, and political influence increased through the 19th and 20th centuries. Since the mid-20th century, the United States has become a dominant global influence in contemporary economic, political, military, scientific, technological and cultural matters. With the collapse of the [[Soviet Union]] at the end of the [[Cold War]], the nation emerged as the world's sole remaining superpower, greatly influencing world affairs, as it continues to do today. |