The Pentagon has published a fourth batch of declassified unidentified anomalous phenomena (UAP) files, expanding its public archive with dozens of new documents, videos and images that detail unexplained sightings reported by military personnel and federal agencies. The release includes incidents near sensitive military sites, unusual airborne objects tracked by surveillance systems, along with additional historical records from NASA’s Apollo program. Friday’s release adds 40 files to the government’s growing UAP archive. The collection includes 19 videos, 14 documents, four audio recordings, and three images sourced from the Pentagon, NASA, the CIA, the FBI, and the Department of Energy. The files stem from President Donald Trump’s executive order directing agencies to declassify selected government records. Earlier batches became public in May and June. Nuclear site encounter One of the most detailed reports centers on an incident near the Pantex nuclear weapons plant outside Amarillo, Texas, on Sept. 1, 2015. Two security officers responded after an unidentified object entered the facility’s airspace, prompting a temporary lockdown. Witnesses described the object as diamond-shaped with a rounded top. Estimates placed it at roughly four feet tall and two feet wide. Accounts differed on its color, although everyone agreed it moved silently at about 10 to 15 mph. The officers pursued the object but failed to close the distance. After stopping their vehicle, they examined it through binoculars and reported seeing no visible propulsion system. Investigators ultimately classified the encounter as non-threatening because the object never approached sensitive assets. Military tracking challenges Another file documents a 2019 range-fouler incident involving a surveillance aircraft. Military personnel observed a small rectangular object moving through restricted airspace during operations. https://t.co/BeIg6uC5BI - Sean Parnell (@SeanParnellASW) July 10, 2026 According to the report, the object displayed flight characteristics the crew had never encountered. It accelerated quickly enough to escape the aircraft’s tracking system before operators could maintain a lock. A separate debrief from the same year describes another unusual sighting over the eastern United States. The reporting aviator wrote that the object showed flight behavior “unlike anything I had seen” during 28 years of Air Force and Navy service. He added that the object disappeared from the camera’s field of view before the crew could identify it. Other experienced personnel aboard the aircraft also could not explain what they observed. Apollo records return The release also broadens NASA ‘s contribution to the public archive. Newly published material includes images of unidentified objects alongside mission debriefings from Apollo 14 and Apollo 17. Earlier document releases had already included records tied to the Apollo 12 and Gemini 7 missions. Several newer military videos also draw attention. One recording captured over the Yellow Sea in 2023 appears to show an unidentified object interfering with electro-optical and infrared sensors. The nearly five-minute clip becomes progressively more degraded as the recording continues. Another video resembles the long-rumored “jellyfish” or “floating brain” UAP. The footage, recorded over the Atlantic Ocean in 2020, shows a blob-like object with several narrow appendages hanging beneath it. Some of the newest incidents occurred in 2025 within the U.S. Indo-Pacific Command’s area of responsibility. One military sensor tracked what analysts described as a six-pointed star-shaped contrast over the Yellow Sea. Another monitored an unidentified object over the East China Sea for several minutes. The Pentagon began releasing UAP files in May and says additional records will continue to appear as agencies complete declassification reviews.