Night Ledger

Record 215 · March 2010

Anomalous Acute and Subacute Field Effects on Human Biological Tissues

Defense Intelligence Agency (DIA) · United States

Ledger illustration of the record — not a scan of the original paper. — Night Ledger illustration of the file

ScientificUnclassified

The paper reviews historical cases in which human observers sustained injuries, including burns, radiation-like symptoms, blood dyscrasias, neurological effects, and in some instances longer-term conditions such as malignant transformations, after encounters with anomalous vehicles. It argues that these effects can provide forensic clues about the propulsion or energy systems of such vehicles, potentially informing reverse-engineering efforts or threat assessments to U.S. interests. Mechanisms discussed center on heating from electromagnetic radiation (both ionizing and non-ionizing), neuromuscular disruption, and other field effects. The report compiles both published and unpublished medical cases, including some linked to UAP sightings, but presents the analysis as a scientific and medical evaluation of reported anomalous acute and subacute field effects rather than confirming the existence of extraterrestrial craft or occupants.

Public file: Defense Intelligence Agency FOIA Reading Room

Related paper

FOIA / archiveUnclassified

2023–2025

Records from the Office of the Secretary of Defense Relating to Unidentified Anomalous Phenomena, October 1, 2023–2025

National Archives and Records Administration (NARA) / Office of the Secretary of Defense · United States

This Record Group 615 collection at the National Archives aggregates declassified and unclassified U.S. government records on UAP, technologies of unknown origin, and non-human intelligence (explicitly excluding ordinary non-attributed objects), produced in response to the 2024 NDAA.

ScientificUnclassified

GEIPAN / CNES

GEIPAN Statistics and Classification Summary

GEIPAN (Groupe d'Études et d'Informations sur les Phénomènes Aérospatiaux Non Identifiés), CNES · France

Official ongoing statistical summary of all GEIPAN-investigated UAP cases since 1977. Cases are classified into four categories: A (perfectly identified), B (probable identification), C (unidentified due to insufficient data), and D (unidentified after investigation). As of the latest update, only a small percentage remain fully unexplained after rigorous analysis by experts, investigators, and pa

FOIA / archiveDeclassified

August 2026

PURSUE Release 05: Declassified UAP Files (August 2026 tranche)

Department of Defense / Department of War · United States

Fifth tranche of the Presidential Unsealing and Reporting System for UAP Encounters (PURSUE), releasing 41 additional files including historical documents from 1953 onward, videos of orbs and spheres, digital renderings, and investigative PDFs from FBI, DoD, and other agencies. Materials cover global sightings and analyses but attribute most to explainable phenomena or unresolved due to limited da