Pentagon documents reveal sighting of mysterious triangular aircraft by FBI agents

Recently declassified Pentagon documents reveal an FBI report detailing the sighting of a mysterious triangular aircraft in the U.S. West. The aircraft, described as black and exhibiting extreme acceleration without noise or thermal traces, was observed by federal agents near a sensitive national security site. The report, referenced as DOW-UAP-D176, indicates the object had a wingspan of 2.7 to 4.5 meters and a smooth, rivet-free surface. It performed a stable vertical ascent and hovered silently before accelerating to approximately 2900 km/h. The thermal signature remained uniform, with no signs of combustion or friction heat. The incident is classified as an unresolved phenomenon, with no confirmation of extraterrestrial technology or its origin.