that simplify your experience. my name is mike, i'm in product development at comcast. we're working to make things simple, easy and awesome. we are following breaking news at this hour. a frantic search and rescue mission under way for five missing marines off of japan's southern coast after two u.s. military planes collided in air. the crash happened during a refuelling mission shortly after the planes took off from their base near hiroshima. the crash is under investigation. an cnn exclusive.