My first trip across the river was in ‘59, and several hundred times since then. I still work in Mexico, and when I cross the border, it’s at about 30,000 feet, (unless we clear at Del Rio then it’s a little closer to the ground).
The days of driving across ended for me when I stopped doing citizen repatriation, a few years ago.
But yes, it was the Cadillac, and it was a saddle with silver on it. Whether it was Pancho Villas or Joe Blows, I haven’t a clue.

__________________
Halfway and one more step