Washington, DC UFO Sighting (December 13, 1948) — USAF Files
U.S. government investigators recorded an unidentified object sighting over Washington, DC, in December 1948, involving stationary, glinting lights.
Historical Context
The sighting in Washington, DC, occurred during a period of intense atmospheric and aerial uncertainty in the United States. Following the June 1947 Kenneth Arnold sighting and the July 1947 Roswell incident, the American public and military establishment entered an era characterized by widespread reports of unidentified flying objects, often referred to at the time as flying saucers. This period was marked by the early tensions of the Cold War, which heightened sensitivity toward any unidentified aerial phenomena appearing near the nation’s capital. During this era, the phenomenon was often analyzed through the lens of emerging radar technology and the rapid advancement of aeronautical engineering. Investigators frequently had to distinguish between potential Soviet incursions, experimental domestic aircraft, and natural atmospheric events.
The December 13 Incident
On December 13, 1948, U.S. government investigators recorded an unidentified-object incident over Washington, DC. The details of this specific event remained restricted for decades, only being released to the public on May 8, 2026, as part of the Presidential Unsealing and Reporting System for UAP Encounters (PURSUE). The documentation for the event is found within official U.S. Department of Defense files.
The records indicate that two individuals, identified as Captain Cassidy and Sergeant Turner, reported observations related to unidentified flying objects. According to the documentation, the objects were described as being stationary and exhibiting a brilliant glint of light. These lights were positioned directly in the flight path of the observers. While the incident is categorized as a radar track case, implying the presence of unidentified objects detectable via radar equipment, the released documents provide no radar confirmation for these specific sightings. The total number of witnesses involved in the observation is not specified within the released file.
Documented Characteristics
The primary descriptors used within the official file to characterize the phenomenon are “brilliant,” “stationary,” and “directly in flight path.” These descriptors highlight the visual intensity and the lack of apparent motion of the objects during the period of observation. Such characteristics—specifically the lack of movement and the sudden brightness—are common elements in many mid-century aerial reports, though they often present challenges for investigators attempting to differentiate between physical craft and optical illusions.
Investigation and Classification
The investigation of this case, as documented in the Department of Defense files, remains part of the broader historical record of post-war aerial anomalies. Under the current framework of the All-domain Anomaly Resolution Office (AARO), all records released under the PURSUE program are designated as unresolved by default. The federal government has not reached a conclusion regarding whether the objects observed by Captain Cassidy and Sergeant Turner were anomalous or conventional in nature.
In the broader context of 1940s aerial sightings, investigators often considered several conventional candidates. These included the presence of experimental aircraft or weather balloons, such as those utilized in the Project Mogul series during the late 1940s. Other possibilities included atmospheric optical phenomena, such as lenticular clouds or sundogs, as well as astronomical objects like the Moon, Venus, or meteors appearing near the horizon. The Washington, DC, sighting remains a significant entry in the archive of documented aerial events due to its proximity to the seat of government and its inclusion in the recent large-scale declassification efforts.