I have a 5 hour layover in Dallas - what should I check out while I am there to pass the time?

I agree with the other guys there's really not that much time to do anything. Considering the time it take just to get on and off the airport property, waiting for a bus or taxi each way, possible traffic and getting through security on the way back, not to mention what you will do with your bags (if you have any) But if you are really ambitious you might go to this Air Museum for about an hour. Https://goo.gl/maps/y7lx0 I recommend you just get a good book and read for a bit.

Come back to Dallas when you have more time.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.