The official description
The United States Indo-Pacific Command submitted a report of an unidentified anomalous phenomenon to the All-domain Anomaly Resolution Office (AARO) consisting of 57 seconds of video footage from an infrared sensor aboard a U.S. military platform in 2023. Video Description: 00:00-00:05: No content. 00:06-00:07: An area of contrast enters the sensor field-of view from the bottom edge. 00:08-00:51: A rectangular digital overlay, or “focus box,” appears near the center of the frame. This display element is a graphical component of the sensor system and does indicate a physical change in the environment.
Quoted from the U.S. Department of War, PURSUE UAP releases. Read every file for this incident in Official files or at war.gov/UFO.