Well Trained Driver?????

True Story:
Aren't all truck driver stories true?????
OK. Enough of the wisecracks, which leads me to a riddle.
How can you tell the difference between cowboy boots and truck driver boots.? The answer at the end.
OK, this is true.
Several months ago I was on a 2 lane road that was blocked in both directions by a 5th wheel gravel truck that was turned over. A lot of gravel haulers were on this particular road. The State Police told us in the line that it would be several hours before the road would be opened and to drive ahead about 1/4 mile, where we could back into a roadway turn around and take an alternate route. It took about 30 minutes for me to get to the turn around point, but the 5th wheel gravel truck in front of me wasn't moving into position to back into the driveway and turn around. I got out, walked up to the driver and asked if he was going to turn around. In his best Mexican English he told me he didn't know how to back up.
Three questions come to mind.
Was this driver a US Citizen?
How did he get a CDL license?
Who hired him?
Enough said.
OH, answer to riddle. On cowboy boots the BS is on the outside.
Enjoy the day
Flat Tire