"The 1990 FBI videotape of Washington, D.C. mayor Marion Barry smoking crack transfixed television viewers nationwide. Shouting now-notorious obscenities at the woman who helped agents trap him, Barry was publicly disgraced, his personal and political life apparently wrecked. But in 1994, following his release from federal prison, Barry was elected once more to serve as mayor of the nation's capital.How did Barry pull off his political resurrection?...