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Facebook and Twitter are playing a key role in India's general elections, so much so that these are being described as the country's first digital elections. Shilpa Kannan has a special report.

Also on the programme, William Easterly, economics professor at New York University, tells us why he's written a book arguing that some international aid "disrespects the poor". And Jeremy Wagstaff, Reuters' technology correspondent, explains why modern-day piracy on the high seas is all about computer hacking.