Going thru "Checkpoint Charlie"

In 1963 (I'd assume it would be two years before the filming), there was no straight shot thru the border crossing; As you crossed from U.S. Berlin into East Berlin, you would find a wall extending from your left to a point halfway thru this entry. Then about 30/50 feet later, another wall from the right hand side requiring an almost agonizing turn to make it impossible for any vehicle to head thru at any speed over 10/15 M.P.H. If memory serves me correctly, my visit to East Berlin was taken about sixteen months after the wall was originally constructed; By limiting the gate between the U.S. Army versus the East Berlin gate, it would make it impossible to drive a potent auto such as a Porsche from the East to the West unless the Auto had wings. I was an Army SP5 at the time and thus had guaranteed entrance into East Berlin as long as I was not in uniform! The most striking things about my visit was that on a gorgeous June day, there were almost no locals taking a stroll as you would find in any sizable West German city.