America finds itself in uncharted territory under Donald Trump – not least when it comes to climate change and Israel policy.
After footage from America's first 'living room war' shocked the public, the government would clamp down on media coverage of future military conflicts.
Wars in Chechnya and Iraq affected the stories American and Russian leaders tell about their place in the world.
Our series on understanding Islamic State attempts to catalogue many of the forces and events that can arguably have played a part in creating the conditions necessary for these jihadists to emerge.
The rise of Islamic State and its declaration of the caliphate can be read as part of a wider story that has unfolded since the formation of modern nation states in the Muslim world.
Overshadowed by the terrible conflicts to come, this short operation was nevertheless a significant global event.