US government assassinating US citizens

This video from the USA says about itself:

Obama Administration: US Forces Can Assassinate Americans Believed to Be Involved in Terrorist Activity

USA: A memorandum drafted last year spells out the claim that the president can authorize a killing regardless of legal and constitutional prohibitions: here.

Anwar al-Awlaki was selected for assassination as a test case that, if successful, would set a precedent according to which the executive branch of the US government has the unreviewable power to secretly liquidate its political opponents, including US citizens: here.

Yale Law Professor Bruce Ackerman: “The killing of an American citizen without due process is a national scandal”: here.

Execution by secret White House committee: here.