Former acting attorney general Sally Yates took a moment during her Senate testimony Monday to clarify the workings of the much talked-about process of "unmasking" names of U.S. citizens whose data is incidentally collected during surveillance of foreign intelligence targets. "As a consumer of intelligence," Yates explained. "Oftentimes we receive intelligence reports where the name of the American citizen is already unmasked, and it is unmasked by the intel agency, not because of anyone's request, but because it is essential."