As America warns that cyber attacks could constitute an act of war, [BBC senior correspondent] David Willis is in California [at FiRe 2011] to discuss the economic implications of computer sabotage. Where does the threat come from and what are the solutions? He speaks to Richard Marshall, the director of Global Cyber Security at the US Department of Homeland Security.

Plus, Mark Anderson CEO of Strategic News Service talks about Chinese cyber threats.

What are the costs of cyber crime? Mike Buhrmann, chief executive of Finsphere, tells David about the software platform which uses your mobile phone to track you and your credit card purchases.

And Chris Drumgoole, of cloud company Terremark tells us how the ‘cloud’ can be a safer place?

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