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US cyber security 'under threat'
Malicious cyber activity is occurring on an unprecedented scale with extraordinary sophistication." That is what America's top intelligence official, Dennis Blair has told the US congress.
It was a pretty stark warning about the risks that come with government, business and personal reliance on the internet.
The US could suffer a "cyber Pearl Harbour" he said as he described the potentially devastating consequences of a co-ordinated attack on America's technological infrastructure.
Every year the intelligence chief comes in front of the Senate intelligence committee to give an assessment of the threats facing America.
This year the cyber threat was what he chose to mention first, a sign of how seriously the US takes it.