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Analysis of unmanned aircraft in combat urges Britain to establish policy on 'acceptable machine behaviour'
Forces loyal to the Libyan leader Muammar Gaddafi are moving into rebel territory in the east, capturing an oil installation in the town of Brega.
University of Birmingham scientists have built an invisibility cloak that makes objects vanish
OECD study also says state-supported cyberwar will become more common alongside conventional attacks
Scientists are racing to perfect practical cloaking devices that can hide objects from sight by bending rays of light.
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