20 years ago today the UK, US and coalition forces began a military offensive to overthrow the Taliban in Afghanistan. (Subscribe: https://bit.ly/C4_News_Subscribe) 

Today the Taliban is back in charge - facing an insurgency very similar to the one they once posed.

Islamic State Khorasan Province - otherwise known as IS-K - is the regional affiliate of the Islamic State group.

They came to prominence when they attacked Kabul airport as people were trying to flee - killing almost 200 people - including 13 US troops.

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