From the Guardian:

Drone strikes: tears in Congress as Pakistani family tells of mother's death: Translator brought to tears by family's plea as Congress hears from civilian victims of alleged US drone strike for the first time

The US has repeatedly claimed very few civilians have been killed by drones. It argues its campaign is conducted "consistent with all applicable domestic and international law". Unofficial reports, however, have suggested that hundreds have been killed in Pakistan alone, with up to 200 children killed. 
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On a different note, from Salon.com
Arizona prison horror: “Critically ill” inmates told to “pray” for healing