In 2004, the USS Nimitz carrier group tracked hundreds of anomalous radar signals while preparing for a training exercise. Commander David Fravor, flying an F/A-18 Super Hornet, was dispatched to investigate one signal and encountered an unusual flying craft he described as the "tic-tac." This incident was discussed in the 2017 New York Times coverage of the Pentagon's UAP office, including the now-famous "FLIR" video. Today we're going to discuss the incident in detail, and why it marks a turning point in the UFO conversation.
References:

Detailed Official Report On Harrowing Encounter Between F/A-18s and UFO Surfaces
What The Hell Is Going On With UFOs And The Department Of Defense?
Multiple F/A-18 Pilots Disclose Recent UFOs Encounters, New Radar Tech Key In Detection
Carrier Group In Recent UFO Encounters Had New Air Defense Tech Like Nimitz In 2004 Incident
Recent UFO Encounters With Navy Pilots Occurred Constantly Across Multiple Squadrons
Stunned by UFOs, ‘exasperated’ fighter pilots get little help from Pentagon