That had to have been a cold drive in January!
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“1951 Press Photo Soldiers drive amphibious jeep in Chesapeake Bay near Virginia.This is an original press photo. Amphibians – US – A Marine drives an amphibious jeep in Chesapeake Bay, off Little Creek, Virginia, during training exercises. According to the Navy, jeeps such as this will operate with only the driver’s head above the surface. The curved tube attached to the windshield is the exhaust pipe. Straight tube is the air intakePhoto measures 8.25 x 6.5inches. Photo is dated 01-17-1951.”