One of the world’s most wanted terrorists - Al Qaeda chief Ayman al-Zawahiri - has been killed by US forces in a over-the-horizon operation.  We unpack who Al-Zawahiri was - and what Al-Qaeda is doing in Taliban territory.

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This episode of The Front is presented by Claire Harvey, produced by Kristen Amiet and Hareem Khan, and edited by Tiffany Dimmack. The multimedia editor is Lia Tsamoglou, and original music composed by Jasper Leak.