American flyers with the B-24 "Burma Queen," serial #42-73253, of the 425th Squadron, almost certainly in China. During WWII.
Unknown exactly who they are, but they might be pilot Glenn Lowe, copilot Joel Grayson, and others who usually flew the plane.
In China, on one mission another crew would "borrow" this B-24 for a mission and were eventually forced to bail out, losing the plane, all crew surviving without serious injury.
(Thanks to S. Skurnowicz for image and info!)