Pien Huang is a reporter on the Science desk, covering public health and health disparities. She also guest hosts on NPR news programs, and narrates the Moments in History series on the NPR One app.

(Chen Jimin/China News Service/VCG via Getty Images) The Aviation Industry Corporation of China (AVIC) has revealed that its new Wing Loong-X (WL-X) unmanned combat aerial vehicle (UCAV ...