I really dislike the DFW Terminal D setup after customs and luggage drop. First you unload all your stuff into bins using the far too short counter and then have to merge with another line for the X-ray machine. You have to carry all of your bins and bag (I always have 3 bins due to my laptops) across the gap and onto the belt for the machine - which is also too short to hold anyone than two bins. I have seen several older people have some difficultly with this setup.