National Geographic : 1936 Dec
01 Photograph byClyde Sunderland SAN FRANCISCO, END OF THE OLD FRONTIER AND BEGINNING OF THE NEW Sky pioneers of the Pacific now wing their way over tall towers and bridges on their way out of the Golden Gate. Pan American's Alameda airbase, home port ofthe sky-going Clipper ships, lies across the bay to the right. The new San Francisco-Oakland Bay Bridge, one of the world's mightiest over-water structures, links Oakland in the distance with San Francisco by way of Yerba Buena. At the left, toward the waterfront and the tower of the Ferry Building, runs Market Street.