ANGEL FOSTER has a vision of a patient. “Imagine you’re a 23-year-old woman in rural Texas”, the doctor and public-health researcher says. This patient is pregnant and wants an abortion. For years, she’s been told that it is illegal in her state, with almost no exceptions. But then, with a bit of Googling, “you find out that there’s this group of people in Massachusetts that will send you FDA-approved medications in the mail.” The ordeal will be over in a few days and will cost $5. “It sounds absolutely bananas, right?” she asks “How could it be legal? How could it be safe?”