Discovery: Chi Onwurah

As a black, working class woman from a council estate in Newcastle, Labour MP Chi Onwurah was in a minority of one studying engineering at university in London and encountered terrible racism and sexism. She went on to build digital networks all over the world, the networks that make today's instant muli-media communications possible. Now Shadow Minister for Science, Research and Innovation, she talks to Jim Al-Khalili about why she wanted to become a telecoms engineer and why engineering is a caring profession