Sir David Omand, the government's former security and intelligence co-ordinator, says our rights to privacy must be sacrificed for the sake of national security. Home affairs editor, Alan Travis, explains how our civil liberties would be affected by new data-mining technology.
Neuroscientist Lady Susan Greenfield, the director of the Royal Institution, has told the House of Lords that social networking sites such as Facebook and Bebo present a threat to children's brains. She says their use encourages a shorter attention span and instant sensation.
Annie Leibovitz, the photographer, has reportedly borrowed more than $15m, using the rights to her photographs as collateral. Ed Pilkington reports from New York.
Nasser Abufarha of the Palestinian Fairtrade Association, talks to the Guardian's Mark Tran about the first ever Fairtrade Palestinian olive oil.
And as carnival season reaches its climax in Brazil, Ed Ewing reports from Olinda.
