So you’ve just popped down to the supermarket for the weekly shop, toddlers in tow, when the grenades start to fly, the air lights up with tracer bullets and you realise to your horror that unless you find a suitable hiding place in a matter of seconds these are the last moments you’ll spend with your kids on earth.
This was the awful crisis that faced Amber Prior and her children, who were among the numerous innocents caught up in the al-Shabaab suicide attack on the Westgate shopping mall in Nairobi, Kenya, last year. Their tale was told in the BBC2 documentary Terror at the Mall, and I make no apologies for reviewing it late because it is surely one of the most gripping and important pieces of television any of us are likely to see this year.
What made it so remarkable is that it’s the first major terrorist atrocity to have been caught in detail on camera from the beginning almost to the very end.

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