there have been chronic and deplorable accountability failures with respect to policies, practices and conduct that resulted in alleged unlawful killings – including possible war crimes – in the United States’ international operations. The Government has failed to effectively investigate and punish lower-ranking soldiers for such deaths, and has not held senior officers responsible under the doctrine of command responsibility. Worse, it has effectively created a zone of impunity for private contractors and civilian intelligence agents by failing to investigate and prosecute them.