Karl Hofer sat behind his office desk, wondering what went wrong at the checkpoint. He left explicit instructions for the guards, warning that a blonde woman would attempt to cross the border with a fake Swiss passport. But apparently, they apprehended the wrong blonde woman. Or he had bad information.
A map of the Mitte section of Berlin lay sprawled upon his desk. It was very detailed, complete with the infrastructure needed for a city the size of Berlin. The drawings showed sewer lines, U-bahn and S-bahn stops and stations, utility lines – gas piping and power lines – shared by the sectored city, and any streets that intersected West Berlin, including the exact location the wall crossed the boulevard. Watchtowers, so critical for surveillance of the newly constructed border wall, were
