“When we first arrived in Berlin last summer, the concrete curtain had not yet fallen,” wrote National Geographic correspondents Nathaniel Kenney and Volkmar Wentzel in 1961. Their account, which appeared in the December 1961 issue of the magazine along with dozens of color photographs, provides readers with a deeply thoughtful and occasionally harrowing account of how the barricades rose and spliced through the heart of Berlin, and how residents of West Berlin were rebuilding their lives in an urban island surrounded by Communist forces.