An attorney for survivors of a U.S. drone attack in Pakistan says he is being blocked from traveling to the United States to help his clients appear before Congress. Shahzad Akbar of the British group Reprieve says the State Department has approved the survivors’ travel visas, but not his. Akbar has been a vocal campaigner against the U.S. drone war, representing more than 150 survivors and their families in lawsuits against the United States and Pakistani governments. His clients, Rafiq ur-Rehman and Rehman’s two young children, are set to testify at a House hearing on drone strikes overseas. Both children were injured in an attack last October that also left their grandmother dead.