Could drones for pollinating crops be told to attack us?

It seems like a perfect opportunity for technology to step in and solve problems in the natural world – using tiny helicopter drones to pollinate crops as the number of bees plummets. But amid all the buzz, could this plan for'robot bees' have a sting in the tail? One scientist has suggested the robobees could be taken over by hackers – and turned into killing machines. The robots are under development in both the US and Japan, and it is hoped they could be ready for use within a decade. Under the plans, the drones would wear fuzzy'jackets' that pollen would then stick to, allowing them to pollinate flowers.