Fighting off 'Killer Robots'

More than 1,000 tech experts, scientists and researchers have written a letter warning about the dangers of autonomous weapons, warning that a 'military AI race is a bad idea'. One signatory, Heather Roff Perkins from the University of Denver spoke to the BBC's Dominic Laurie. (Image: Robot being used in a protest in London aginst lethal robot weapons, Getty Images)