Narrated by Chris Evans, Chain of Command inhabits the rarely-glimpsed innermost sanctums of the Pentagon and battlefield frontlines across the world. This unprecedented access, along with personal interviews, provides an intimate portrait of the men and women devoting their lives to fighting extremism - from fighter jet pilots to the Chairman of the Joint Chiefs of Staff.
Never miss a Nat Geo moment
Join our curious community and you'll have access to some great features!
Personalised content reflecting your interests on the site
Watch exclusive videos before anyone else
Favourite content that you like or want to check out later
Free SMS and Email reminders so you never miss a show
Get notified when content that interests you is published
Share your photos on Snap! that could appear on TV
Share your thoughts and opinions on various matters
Receive a monthly newsletter with loads of great content