First American movie filmed (in 1954) in Durango, Mexico, because art director Jack Martin Smith liked the soundstages in the city and found the surrounding landscapes to be just what he was looking for.
To "show the white feather" is considered, in many places, to show cowardice. In others, it is a sign of high respect and, in still others, it serves the same purpose as a white flag of truce.
Robert Wagner starred in another movie with Jeffrey Hunter known as A Kiss Before Dying (1956), also starring Joanne Woodward.