Federal law enforcement in the United States is more than two hundred years old. For example, the Postal Inspection Service can trace its origins back to 1772,  while the U.S. Marshals Service dates to 1789.
The Southern United States (also known as The Southern States or "The South" among Americans) is a term for the Southeastern part of the United States. All Confederate States were in the South, but not all Southern States joined the Confederacy. The States farthest to the south are called the "Deep South".
The continental United States is the area of the United States of America that is located in the continent of North America.It includes 49 of the 50 states (48 of which are located south of Canada and north of Mexico, known as the "lower 48 states", the other being Alaska) and the District of Columbia, which contains the federal capital, Washington, D.C.
The following is a list of United States military aerial refueling aircraft