The lead character referred to Keesler as an air base. It is, in fact, an Air Force Base. In the USAF, air bases are what overseas posts are called.
When Holly is talking to Jack in his room she picks up a model P51 Mustang and states that her father flew one in the USAF, The last P51's were phased out of USAF and ANG service in the mid to 50's so it is highly unlikely that her father was in the AF when P51's were still there. Unless her father was old when she was born. He would have been born no later than the mid to late 30's to have been old enough to be in the USAF during the time p51's were in service.