From Afghanistan to the US and across the world, the repercussions of the attacks 20 years ago reverberated then as they do now.

A relative of the bereaved, Mike Low, commemorated his daughter Sarah, a flight attendant: 'These 20 years have felt like both a short moment and the longest moment'.

We speak to three people caught up in the attack to ask what they remember of that day and what they make of the 20 years that have followed.

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