and tonight pakistan's prime minister nawasa sharif is at the white house for his first face-to-face meeting with president obama. one of the issues on the table is the use of drones in pakistan. we'll talk about drone strikes, u.s. national security policy and pakistani american relations. but first this background. >> this young girl has never received an explanation of the drone strike that killed her grandmother who was picking vegetables in a large family field. >> killed in a drone strike that appears to be directed at her. her grandchildren recounted in painful detail the moment when she was blown into pieces in front of their very eyes. >> reporter: this is familiar i.d. card is all that they have left of the 68-year-old grandmother, the victim of an alleged u.s. drone attack in pakistan. her killing is just one example used at a press conference in washington, d.c. where two high profile human rights organizations teamed up to issue dual reports of victims of u.s. drone strikes specifically in pakistan and yemen. the story is far from an isolated incident. >> u.s. drone assi