At an air show over El Bosque Air Force Base in Santiago on November 5, 2010, an object moving too fast to be seen by spectators or pilots passed near three separate jet formations. Halcones, F-5s, and F-16s. Seven video recordings from different angles captured it. CEFAA photogrammetric analysis by Air Force and Army technicians estimated its velocity at 4,000 to 6,000 miles per hour.

An engineer at the adjacent Pillán aircraft factory spotted the anomaly in slow-motion review and submitted the footage to CEFAA. Gen. Bermúdez commissioned a multidisciplinary team including an astronomer and eight other scientists who ruled out insects, birds, drones, and conventional aircraft. The object produced no sonic boom at the estimated speed and showed what analysts described as three distinct controlled elliptical passes. CEFAA's official finding: unidentified aerial object under apparent intelligent control.