We initially opted for the DMZ tour. We were informed the DMZ area was closed by UN due to african swine flu for safety reasons and were offered the NLL tour. We decided to proceed with the alternative tour and were promptly picked up at 8am at our hotel in Seoul. The tour guide was very knowledgeable and provided a lot of information about the history of north and south Korea. The NLL tour also comes with a Q&A with a north Korean defector, which we can ask questions through the tour guide during the bus ride. Passport and security checks are not required. Recommended if you are interested to learn about the history of Korea, and specifically to understand life as a north Korean defector. Service from booking the activity until the end of the tour was excellent!