So I asked the CIA and the Justice Department to tell me why it’s legal to kill Anwar al-Awlaki or any other American citizen believed to be a member of al-Qaeda without due process of law. That was about a month ago. Today I heard back. This was an actual response from CIA:

Our records are not configured in a way that would allow us to perform a search reasonably calculated to lead to responsive records. Therefore, we must decline to process your request.

May I recommend you read the entire account of what happens when a search for basic constitutional considerations runs through the maze of bureaucracy?