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Following allegations that the National Security Agency collected and stored almost 200 million text messages from across the globe, President Obama is expected to announce changes to US electronic spy programmes. The revelations were made by Edward Snowden and reported in the UK media. A study has shown that six out of ten Americans want a reform of data collection. We will hear your reaction to Obama's speech, as well as hearing your thoughts on data collection and alleged spying. (Photo: President Barack Obama. Credit: Associated Press)