A soldier stands in front of a ‘Shadow’ Unmanned Aerial System during an official presentation by the German and U.S. Unmanned Aerial Systems (UAS) at the US military base in Vilseck-Grafenwoehr. Photograph: Michaela Rehle/Reuters

US drone strikes killed a Pakistani grandmother and 18 civilian labourers last year, Amnesty International said today, shedding new light on a major s(...)