In this first of two podcasts, listen in to hear about the rebooting of a Syrian rebel group, an old drug and your computer.
The US seems stuck in War-on-Terror mode even though reality has moved on.
Jabat Al-Nusra goes its own way.
Orient News TV/EPA
When it comes to the Syrian opposition, it's practically impossible to separate 'moderates' from 'extremists'.
Without the perfect-storm conditions of post-invasion insurgency, this most potent expression of al-Qaedaism yet would never have risen to dominate both the Middle East and the world in the way that it does.
The final article of our series on the historical roots of Islamic State examines the role recent Western intervention in the Middle East played in the group's inexorable rise.