“The weakest link in America’s national security may not be foreign technology but its own people. Mara Hvistendahl traces the story of the single mother who sold out to China.”
How did more than 160 million women go missing from Asia? The simple answer is sex selection — typically, an ultrasound scan followed by an abortion if the fetus turns out to be female — but beyond that, the reasons for a gap half the size of the U.S. population are not widely understood. And when I started researching a book on the topic, I didn’t understand them myself.