National Geographic's 'Great Migrations' - Behind the Scenes

Starting in 2007, National Geographic crews dispersed all over the planet to film the most amazing and unique animal migration stories ever told. Over the 2 years, the crew spent 350 hours in trees, 500 hours in blinds and 400 hours underwater. This behind-the-scenes story takes you to the depths of the sea and the far corners of the earth as you experience the dangers, difficulties and adventures of a National Geographic Cameraman.