Limiting the tobacco industry's future liability was one of the main sticking points during round-the-clock negotiations over the weekend.

CNN: McCain Unveils Proposed Tobacco Policy

Wiltshire Council said more than 3, 000 tonnes of salt had been spread over the weekend, with its highways teams working around the clock.

BBC: Wiltshire snow: Gritting teams remain at work

Appearing last weekend at a Defcon conference, she reported how she could manually advance the clock as well as circumvent protective technology.

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