“Carol Ball’s day begins in the dark, in another state. By the time she arrives at work, crosses a snowy parking lot and enters the austere one-story Planned Parenthood clinic here, she has flown 200 miles to do something no South Dakota doctor will do. Ball performs elective abortions. She is one of four doctors who travel anonymously, for security reasons, to the lone clinic in a state that has seen some of the nation’s fiercest battles over reproductive rights,” writes Peter Slevin for The Washington Post.