5 things to know for Feb. 19: Andrew Mountbatten-Windsor, Board of Peace, Iran, Social media trial, California avalanche

By Alexandra Banner, CNN More than three weeks into the search for Nancy Guthrie, investigators are now using genetic genealogy in the hopes of identifying a suspect. The technology has previously achieved major successes in solving high-profile cold cases by tracing family trees through DNA databases. Here’s what else you need to know to get