American and South Korean forces have begun their annual joint military exercises in South Korea, and the North Korean authorities are making their feelings clear by saying it's a dangerous provocation. Tensions are rising in Seoul and Pyongyang, that have been building since North Korea started to prepare to launch a satellite. Some countries say they're concerned that the launch will be a long-range missile test. John Sudworth, BBC correspondent in South Korea, joins The Takeaway to talk about the atmosphere during the wake of the launch.