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After the killing of a British soldier on the streets of Woolwich in London, it emerged that the suspects were known to the security services. But how feasible is it for the authorities to keep track of everyone on their watch list? Tim Harford crunches the numbers, with the help of the former head of MI5, Dame Stella Rimington. Plus: a listener requests a cost-benefit analysis of kidney donations; and Johnny Ball gives the Apprentices a maths lesson.
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Next show coming soon!
Next show coming soon!
Hosted on Acast. See acast.com/privacy for more information.
Hosted on Acast. See acast.com/privacy for more information.
Find out how to crush negative cash flow that's hurting your finances.
Hosted on Acast. See acast.com/privacy for more information.
Tim Harford examines Ryanair?s claim that more than 90% of its flights land on time; and discovers that millions of scientific papers may be incorrect. Producer: Ruth Alexander