VOA Asia - VP Mike Pence is in South Korea amid the North's provocations

North Korean provocations continue as the United States seeks greater pressure from China. Vice President Mike Pence is in South Korea, before making other stops on a 10-day Asia visit. Afghanistan protests use of "the mother of all bombs" on its soil. A journalist in Cambodia 40 years ago finishes his story. Two centuries of research still falls short on a Parkinson's cure.