Two years later , he earned a master 's degree in history from Missouri State University ( then Southwest Missouri State University ) . Two years later , he bought a master 's degree in history from Missouri State University ( then Southwest Missouri State University ) .
Dua tahun kemudian, beliau memperoleh ijazah sarjana dalam sejarah dari Missouri State University (kemudian Southwest Missouri State University). Dua tahun kemudian, beliau membeli ijazah sarjana dalam sejarah dari Missouri State University (kemudian Southwest Missouri State University).