Bill Gates warns tens of millions could be killed by bio-terrorism

Microsoft founder and philanthropist tells Munich security conference genetic engineering could be terrorist weapon

A chilling warning that tens of millions of people could be killed by bio-terrorism was delivered at the Munich security conference by the world's richest man, Bill Gates

Gates, who has spent much of the last 20 years funding a global health campaign, said: "We ignore the link between health security and international security at our peril."