Incidents corroborated by radar, FLIR, or electronic sensors — and cases where equipment malfunctioned in proximity to the UAP.
Football-shaped UAP captured by advanced US military sensor platform in the Indo-Pacific. Object caused temporary sensor interference upon approach and displayed acceleration beyond Mach 5.
Recurring UAP activity reported near nuclear installations in Eastern Europe. Luminous spheres that neutralized sensor systems upon approach. Recurring pattern documented across multiple facilities.
Over three nights, USAF security personnel at RAF Woodbridge reported a structured craft in Rendlesham Forest. Deputy Base Commander Lt. Col. Charles Halt filed an official memorandum to UK Ministry of Defence. Ground traces, radiation readings, and Halt's own audio recording of the event are included in the 2026 declassified archive.
JAL Boeing 747 Captain Kenjyu Terauchi reported two unidentified objects flanking his aircraft for 50 minutes over Alaska, followed by a massive object he described as 'twice the size of an aircraft carrier' which appeared ahead of the plane. FAA Anchorage center and Elmendorf AFB radar confirmed returns. The FAA opened a formal investigation.
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.'
Over 13,500 witnesses reported a large triangular object with bright lights traversing Belgium over 18 months. Belgian Air Force F-16s achieved radar lock on the object twice; it accelerated from 280 mph to 1,100 mph in 2 seconds and descended from 10,000 ft to 1,000 ft in 5 seconds. The Belgian government publicly acknowledged and investigated the sightings. U.S. Embassy Brussels diplomatic cables are included in the 2026 archive release.
A USAF RB-47 electronic countermeasures aircraft tracked an unknown object visually, on airborne radar, and via its electronic intelligence equipment simultaneously for over 90 minutes across multiple states. The object appeared, disappeared, and reappeared on three different sensor systems independently. Project Blue Book's Scientific Consultant, Dr. James McDonald, called it 'one of the most puzzling in the whole Blue Book collection.'
Over the course of two hours on November 2, 1957, nine independent witnesses in and around Levelland, Texas reported their vehicles' engines dying and headlights extinguishing when a large, glowing egg-shaped object appeared near or over their vehicles. Engines and electrical systems restarted immediately when the object departed. Six separate highway incidents in different locations within a 10-mile radius all occurred within the same two-hour window.
Radar operators at RAF Bentwaters and Lakenheath tracked multiple unknown objects over East Anglia for several hours. A USAF Venom jet interceptor was guided by radar toward one object; the pilot briefly achieved visual contact, then the object moved behind the aircraft and mirrored its every turn — effectively pursuing the interceptor. The pilot could not shake the object through multiple violent maneuvers. The Scientific Advisory Panel (Robertson Panel) evaluated this case in 2026 archive release notes as 'unexplained.'
In March 1967, a red-orange glowing orb was observed hovering over Launch Control Facility Echo at Malmstrom AFB. Within minutes, all ten Minuteman ICBMs at Echo went into 'No-Go' status — the missiles were inoperable for nuclear launch. A similar event was reported separately at Oscar Flight the same morning. The event has never received an unclassified technical explanation.
A classified video captured in 2022 over the Yellow Sea shows a spherical UAP moving at high speed. The footage, described by intelligence officials as among the clearest recorded encounters in the archive, is included in the May 2026 Pentagon release. The object's speed and flight characteristics were assessed as inconsistent with any known aerial platform.
A B-52H crew and ground radar simultaneously tracked an unidentified object over Minot AFB's nuclear missile field. The object descended to 200 feet, disrupted radio communications, and was observed by base security near missile launch facilities. Project Blue Book closed the case as 'insufficient data' — later declassified Blue Book files show the radar returns were confirmed as real targets.
An unidentified helicopter-like object repeatedly overflew the nuclear weapons storage area at Loring AFB over several nights in October 1975. SAC headquarters issued an urgent classified message acknowledging the intrusions. Similar incidents occurred simultaneously at Wurtsmith, Malmstrom, Minot, and Canadian Forces Base Falconbridge — suggesting a coordinated operation against North American nuclear sites.