I think thy wouldn’t let me out due to the security, had to go through it again if I went outside
If you are there on a layover, the only way to smoke is to go outside, but that means you leave the secured terminal and have to go back through security to get back into the terminal. Some people think the smoke-free environment makes DFW a terrible airport. Other people think the smoke-free environmnent makes DFW a great airport.