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What should be the rules of engagement when it comes to cyber warfare? An international think tank has met in Munich to work out joint ways of limiting the threat of cyber attacks. Frank Coggrave discusses the outcome.

Tracey Logan reports on the brainwave that has led to a whole symphony being composed in the mind of a computer. And she visits the Centre for Computer Music Research in southern England to see how music can be composed simply by staring at a computer screen.

Gareth Mitchell is engaged in combat as he takes to Brazilian airspace in an F15 fighter jet. Luckily, although it's all too real an experience, it's only a simulator on display at Campus Party Brazil.

Twitter may be text based and only allow just a few words at a time but researchers have discovered there are still regional dialects in our Tweets. Jacob Eisenstein examines the results.