All-domain Anomaly Resolution Office

The All-domain Anomaly Resolution Office (AARO) is an office within the United States Office of the Secretary of Defense that investigates unidentified flying objects (UFOs) and other phenomena in the air, sea, and/or space and/or on land: sometimes referred to as "unidentified aerial phenomena" or "unidentified anomalous phenomena" (UAP). Its first director was physicist Sean Kirkpatrick, and its current acting director is Tim Phillips who reports to Deputy Defense Secretary Kathleen Hicks.