TODAY News, July 27: Deadly Seattle Festival Shooting | New Developments in Berlin Pride Attack | Missing American Mom in Grenada

Chaos erupted at a Seattle food festival when at least three people were killed in a shooting. Also, a suspect has been killed after a deadly terror attack at a pride event in Berlin. Plus, the search is intensifying for a mother from North Carolina who vanished on a Caribbean vacation. And, line dancing is experiencing a major resurgence nationwide.