Max Pearson presents a collection of this week's Witness History episodes from the BBC World Service.We hear about Vietnam's manicure godfather, how Bengaluru became India's Silicon Valley and how the first ever photograph from a mobile phone was sent.Plus, the popularity of theoretical physicist Prof Stephen Hawking's book, A Brief History of Time, and the windmill that revolutionised wind power.Contributors:Tuong Vu - Professor of Political Science at the University of Oregon. Kien Nguyen - Wife of Minh Nguyen. Narayana Murthy - Founder of Infosys. Philippe Kahn - Software engineer and owner of world's first mobile phone photo. Peter Guzzardi - Publisher and editor. Britta Jensen - Teacher. (Photo: Minh and Kien Nguyen outside beauty school in California. Credit: Kien Nguyen)

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