Diamond UAP Cases

RAPID ACCELERATION90 DEGREE TURNSSENSOR INTERFERENCE

DOD-012 · 1976-09-19

Tehran UFO — Iranian F-4 Weapons System Failure

◎Tehran, Iran

Two Iranian Air Force F-4 Phantoms attempted to intercept a bright diamond-shaped object over Tehran. Both aircraft experienced complete weapons systems and communications failures when attempting to engage. The object emitted smaller objects during the encounter. A Defense Intelligence Agency report called it 'an outstanding report' that 'could be of significant intelligence interest.'

Cash-Landrum Diamond UAP — Radiation Injuries

Calvine UAP Photograph — UK Ministry of Defence

UNCLASSIFIED

DOD-032 · 1980-12-29

Cash-Landrum Diamond UAP — Radiation Injuries

◎Huffman, Texas, USA

Three civilians suffered documented acute radiation injuries after a close encounter with a large diamond-shaped, flame-emitting craft escorted by 23 military Chinook helicopters on a Texas highway. The witnesses sued the U.S. government for damages; the case was dismissed because the government denied ownership of either the craft or the Chinook escort.

HOVERINGEMITTING OBJECTS

State Dept◆ Diamond

◎Calvine, Perthshire, Scotland, UK

STATE-006 · 1990-08-04

Calvine UAP Photograph — UK Ministry of Defence

Two hikers photographed a large diamond-shaped craft hovering at low altitude near Calvine, Scotland. The UK Ministry of Defence classified the photographs SECRET and kept them for 30 years before release in 2022. Defence Intelligence Staff analysts assessed the object as between 25–100 metres in diameter and of 'unknown origin.'

Tehran 1976 — Imperial Iranian Air Force F-4 Intercept

State Dept◆ Diamond

◎Tehran, Iran (airspace north of city)

STATE-031 · 1976-09-19

Tehran 1976 — Imperial Iranian Air Force F-4 Intercept

Two Imperial Iranian Air Force F-4 Phantom jets scrambled to intercept a bright object over Tehran. Both aircraft experienced complete weapons system and communication failures when attempting to engage. The object released a smaller object that pursued one of the F-4s. A DIA (Defense Intelligence Agency) report classified the case as an 'outstanding UAP report' and it became one of the most cited US intelligence UAP documents, later released via FOIA.

RAPID ACCELERATIONEMITTING OBJECTSSENSOR INTERFERENCE

Calvine UAP — UK Parliamentary Questions and MoD Release

State Dept◆ Diamond

◎Calvine, Perthshire, Scotland, UK

STATE-037 · 1990-08-04

Calvine UAP — UK Parliamentary Questions and MoD Release

The UK Ministry of Defence held the Calvine photographs SECRET for 32 years. Parliamentary questions in 2021 about the photographs prompted formal government responses. Journalist David Clarke obtained a copy from a former MoD official and published it, which triggered the official National Archives release in 2022. The released DI55 Defence Intelligence Staff assessment showed the MoD concluded the craft was of 'unknown origin' and not any allied nation's program.

Calvine Scotland MOD Suppression 1990

◎Calvine, Perthshire, Scotland

DoD-B11-014 · 1990-08-04

Calvine Scotland MOD Suppression 1990

The Calvine photographs — six color images of a massive diamond-shaped craft over the Scottish Highlands — were given to the Daily Record but confiscated by the MOD. The photos stayed classified for 32 years. The MOD's own staff described them as the best quality UAP photographs ever received by the Ministry.

Calvine Scotland Diamond UAP Photograph 1990

◎Calvine, Perthshire, Scotland

CONFIDENTIAL

DoD-B18-022 · 1990-08-04

Calvine Scotland Diamond UAP Photograph 1990

Two hikers near Calvine in Perthshire photographed a large diamond-shaped metallic craft hovering alongside an RAF jet over the Scottish Highlands. The photographs were submitted to the UK Daily Record. UK Ministry of Defence confiscated the photographs and classified them for 30 years. A British journalist retained copies. The photographs were finally published in 2022, revealing what researchers consider the clearest daylight UAP photographs in British government history.

Cash-Landrum Incident — Radiation Injuries Texas 1980

DoD-B20-011NORTH AMERICA