Currently the United States owns five inhabited island territories. The citizens of four of them -- Puerto Rico, the U.S. Virgin Islands, Guam, and the Northern Mariana Islands -- are all US citizens at birth. The citizens of American Samoa are born American Nationals who can gain citizenship upon moving to the states. Many of these territories have belonged to the United States for over 100 years, and their citizens have contributed tremendously to American society. They and their state-born d...