Special police units search for long-sought former members of Germany's Red Army Faction (RAF) militant group, Ernst Volker Staub and Burkhard Garweg, during an operation in Berlin on Saturday following the arrest in February of Daniela Klette after more than 30 years on the run. The sense of an ending lingers over Markgrafendamm, a scrappy Berlin street south of the Ostkreuz train station. Ruined railway buildings, some now underground clubs, line one side of the street and compete for space with classic signs of gentrification. Billboards advertise Ugg boots and, before an empty site, a poster for an angular new...