National Geographic : 1943 Apr
©British Combine From Gibraltar Steams the British Battle Fleet-the Mighty Rock Helps ProtectAmericans inAlgeria Key to the Mediterranean's 9-mile-wide front door, the fortress has been British since 1704. Tank traps, pillboxes,flame throwers, and moats guard the narrow connection with Spain. Behind antisubmarine nets, warships and seaplanes nest in the harbor. Soft limestone cliffs are honeycombed with gun pits and living quarters for 20,000 men.