A Pakistani family has confronted the US governement in Congress yesterday over the death of a 67-year-old grandmother killed in a US drone attack. Momina Bibi died instantly when missles from a drone hit her village in North Waziristan. Eight children were also injured. Bibi's son, Rafiq ur-Rehman, has brought his family to the US to tell their story and to find out why she was killed by what the Obama administration calls highly targeted killings, the family's lawyer explains.