Boeing 737-700 (N280WN)

N280WN is a Southwest 737-7H4 delivered in June 2007 to Southwest Airlines and has worn two special liveries. The first one applied in June 2013 was the Penguin One as part of the Southwest and SeaWorld partnership. In April 2015 this aircraft received her current livery in the Missouri One livery. This is part of Southwest State One paint scheme series where the airline paints the state's flag where Southwest has hubs/focus cities onto the main fuselage of the aircraft. At this point Southwest has State One liveries for almost all major Southwest destinations states with George One being the main exception. In this photo Missouri One is departing KDSM in Des Moines, Iowa for KSTL in St. Louis, Missouri.

Dwight, these are a pair of outstanding snaps of Missouri One. Filling in all five for both. Bravos!
And hey, am I seeing an old P-51 Mustang back there? Looks like an "83" or a "93" on it? Sure appears to be a Mustang but these old eyes aren't quite as good as they once were. Tried to enlarge your pic here but still can't be certain. There's a gate back there too, so is it a P-51 on a stick performing gate guard duty? And there is something else just to the right of it? A jet?

Good eye Gary; The tail marking is that of the Tuskegge Airmen, the 332nd!!

Thank you guys so much for the comments, Gary and A Mentor!
Yes, sir! That is indeed a P-51 sitting on gate guard duty at the entrance to the 132nd Iowa ANG base. The jet to the right of it is a F-16A and there is also an F-8 to the left of the P-51 that can't be seen in the image. Thew gate you see there is one that leads to the older portion of the base. The main gate is in a valley just behind the P-51.