What surprised me was that there is something called "United States Postal Inspection Service" that has some police-like law enforcement powers. Every so often you TIL something about the US.
You need to be in good physical shape, willing to work a minimum of 50 hours a week including irregular hours, be on call 24/7, and of course also not only carry a firearm but be willing to use deadly force.
I'm sure they were flooded with applicants.
It is quite ironic considering who really ab/uses the legal monopoly of force to rob others of their copies.
https://www.usa.gov/federal-agencies
Some weird ones are there for sure.