The guy in front of the jeep appears to have lost part of his arm (or it’s an optical illusion).

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“1942 Press Photo Jeep crosses bridge built by Army Engineers for training. This is an original press photo. United States Army – Engineers. On a field maneuver in the Pacific Northwest, the army demonstrated a speedy bridge building project, followed by an even faster demolition job – to train soldiers in both operations. (1) Soldiers laid logs across a swamp; (2) a jeep is first across; Photo measures 9 x 7.25 inches. Photo is dated 3-13-1942.”