NPR Public Editor The Public Editor is the public's representative to NPR, serving as an independent source regarding NPR's programming.

Central American migrants stand at the U.S.-Mexico border fence in El Paso, Texas. The migrants turned themselves in to U.S. Border Patrol agents, seeking political asylum in the United States. John Moore/Getty Images hide caption

toggle caption
John Moore/Getty Images

MMR vaccine being drawn into a syringe. This combined vaccine protects children from three viral diseases: measles, mumps and rubella. TEK IMAGE/SCIENCE PHOTO LIBRARY/Getty Images/Science Photo Libra hide caption

toggle caption
TEK IMAGE/SCIENCE PHOTO LIBRARY/Getty Images/Science Photo Libra