IN 1992, A YOUNG, pregnant American woman named Leona Benten stepped off an airplane at JFK Airport in New York. She had just arrived from Europe. She did not seem any different from any other passenger, except for the fact that she was immediately ushered into Customs amid a tight knot of security. Customs officials confiscated pills that the woman was carrying with her. It was a drug known as RU 486, or the "French abortion pill." At that time, the drug was banned in the United States. Benten, with the support of pro-choice organizations, was trying to challenge the law by bringing the pills into the United States with the intent to use them to end her pregnancy. They wanted to call attention to the ban, so they deliberately...