US NSA spy agency halts controversial email sweep

The National Security Agency announced Friday it would end its controversial practice of sweeping up any email or text message an American exchanges with someone overseas that makes reference to a real target of NSA surveillance.

Image: Teide Observatory on Tenerife, Spain

ESA operates its Optical Ground Station (OGS) at the Teide Observatory on Tenerife, Spain, where a Zeiss 1 m-diameter telescope is used to survey and characterise objects near the 'geostationary ring' some 36 000 km above ...

System to detect and localise all ships in European seas

A European project is coming close to the validation of a prototype of 'Passive bistatic radar' (PBR) technology based on Galileo transmissions. Once finalised, the new system could help relevant authorities to assure better ...

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