NPR's Ailsa Chang talks with Nancy Krieger, a social epidemiologist at Harvard University, about her efforts to preserve federal health data that recently disappeared from government websites.
Lt. Col. Harry T. Stewart, Jr., who was a member of the famed Tuskegee Airmen, died this week at the age of 100. The Tuskegee Airmen were an all-Black unit of pilots that fought during World War II.