Easy crossing...

Touch of Evil / Sombra de mal (Mex) / Sed de mal (Esp-Argen),

This 1958 Orson Welles‘ film has one of the most awesome openings: an incredible  long-lasting (3:30 minutes) continuous sequence-shot that shows both main characters (Chartlon Heston and Janet Leigh, a mixed mexico-american couple, and a car (back of scene) with a clockmaking bomb, crossing the US-Mexican border.  Critics consider one of the best opening-shots of all times, "an example of technical brilliance and a Master class in cinematic story telling" (P. Scollon). The scene seems to have been shot in a scenery set in Ocean Front Walk, LA-California, not an actual border-post.  Crossing the border in 1958, as shown in the movie, was as easy as a pleasant summer evening stroll.

See the full sequence here