A special Sitrep examines the implications of the fall of Kabul, and the Taliban’s return to power in Afghanistan.

We hear from a former Royal Marine still in Kabul, and a journalist who escaped on the day the Taliban entered the city.

A former head of the Army tells us what it felt like to see Afghanistan fall, and we ask what America’s decision to withdraw could mean for its NATO allies.

And we reflect on whether political leaders are right when they insist the near 20-year mission in Afghanistan was still worthwhile.