Protesters call for change in Venezuela

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Supporters of opposition leader Juan Guaidó fill the streets of the capital, Caracas, and are calling for President Maduro to go. Three weeks after Guaidó declared himself interim president, we ask what has changed and how businesses are coping with the ongoing shortages. We speak to Francisco Ibarra who advises companies looking to invest in Venezuela. We hear from Catalonia where 12 separatists have gone on trial this week accused of sedition and rebellion. Plus, the Global Positioning System - or GPS - has won an engineering prize, and we hear from one of its inventors, Hugo Fruehauf. Vishala Sri-Pathma is joined throughout the programme by Andrew Peaple of the Wall Street Journal in Hong Kong and academic and author Cathy O'Neil in New York. (Photo: A protester in Caracas, Venezuela. Credit: Edilzon Gamez/Getty Images)