"The targeted killing of an American being considered right now shows the inherent danger of a killing program based on vague and shifting legal standards, which has made it disturbingly easy for the government to operate outside the law," said Hina Shamsi, director of the ACLU's National Security Project. "This new report comes as the administration continues to fight against even basic transparency about the thousands of people who have died in this lethal program, let alone accountability for the wrongful killings of U.S. citizens."