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NATO today launched its largest-ever cyber exercises to practise warding off massive, simultaneous attacks on member states and their partners. Based at the alliance's cyber defence centre in EU member Estonia, the exercises will last three days and include participants in over 30 European states. "Cyber attacks are a daily reality and they are growing in sophistication and complexity," Jamie Shea, a NATO official specialising in emerging security challenges, said in a statement. "NATO has to keep pace with this evolving threat." Around 400 legal and IT experts as well as government officials will take part in the operation code-named "Cyber Coalition 2013".