This one looks like it could be a casting call for Stanley Kramer’s The Defiant Ones (1958), the one where Sydney Poitier and Tony Curtis escape from jail chained together, on the run from a sheriff played by Theodore Bikel. Actually, you can’t tell by this photo, but judging from the other photos in the batch it came from, it’s turns out they are G.I.’s and this photo was taken in Viet Nam. Their unit seems to be doing some earth moving judging by the dump trucks in the rear of the shot. Possibly building an airstrip in some remote jungle spot. They also appear to be sharing, what back then would have been called “a reefer”. Of course the Ray Ban Wayfarers are a dead give away that the “first termer” on the left is one hep ofay.