The trace of this electrical charge left behind in the fingerprint is imaged using an electric field microscopy system.

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We're in charge - albeit " without any triumphalism and with no trace of any political tribalism" and we've already got one.

BBC: Time to switch back on

Its biggest success the sea-based Aegis combat system can trace its longevity mainly to the fact that the Navy was in charge rather than missile-defense proponents.

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