TSA will be in charge of all transportation if SHTF. Think checkpoints and “Where's your papers/travel orders?” If you have been in an airport lately you will see the demographic of the TSA crowd.
The upside is that since I worked in LE for a while I can say with confidence that most of them couldn’t hit an elephant at 50 yards. Most armed officers never practice except at the once a year re-qualification.
At the range it was laughable how many fumbled with their mags during a reload and then recharging the weapon. As a matter of convenience most don’t know where their extra mags are. Uniformed officers would pull a mag from their belt and it would have food crumbs and funk all over them.
I am not too worried.