Crew with a B-24J. Given that Mazer is a just commissioned "shavetail" 2nd Lt, this image is early in his career, likely while in navigator training stateside (or just possibly enroute to the CBI).
Notice that the photographer or a censor has whited-out the plane serial number and other info.
Joe Considine, Skiles, Erickson, Eisenstat, Schumacher, Pete Abrogast, Zimmerman, Axtell, Mazer, Rigsby.
(Thanks to Tony Strotman for additional information.)