35 mm black-and-white negative

35 mm black-and-white negative; photographed by Carleton Mitchell; ground explosion; probably part of practice maneuvers at Eglin Air Force Base; Florida; 1960; during a Joint Civilian Orientation Conference (program which invites civilian leaders to view various Defense Department operations and build support for the military); handwritten on original envelope "R 17472 C4" (corresponds to original Mitchell contact sheet); printed on negative frame number "10".