Oklahoma is a state located in the south central region of the United States. It is the 20th largest state at 69,897 square miles and the 28th most populate with over 3.9 million residents. It was admitted to the U.S. as the 46th state in 1907. Back in 2007, it had one of the fastest growing economies in the U.S. and it relies on a an economic base of aviation, energy, telecommunications and biotechnology. It is also a major producer when it comes to natural gas, oil and agricultural products.