Today marks 25 years since the US military's ground attack on Afghanistan, the ground attack that toppled the Taliban government after the Taliban gave shelter to Osama bin Laden, the leader of al-Qaeda.

Today marks 25 years since the US military's ground attack on Afghanistan, the ground attack that toppled the Taliban government after the Taliban gave shelter to Osama bin Laden, the leader of al-Qaeda.

Now, a quarter of a century later, the Taliban are blocking several caves in Kandahar, the Taliban's main base, that were once used by extremists.

Kabon Hamosh, BBC World Service correspondent, prepared a special report from these caves.