'After Tiller' explores the subject of abortion with sober clarity ★★★★

Targeted by protests and far worse, abortion providers are on the front lines of a clash between entrenched sects. Some, such as Wichita, Kan., doctor George Tiller, have been assassinated in the name of saving babies. Threats and harassment come with the territory for the remaining few who openly carry on his work, administering legal but increasingly contentious third-trimester abortions. They number four in the United States, and they're the subject of the revelatory documentary "After Tiller...