For several days in November 2004, the cruiser USS Princeton, part of the USS Nimitz strike group off Southern California and Baja California, tracked unknown radar contacts dropping from about 80,000 feet to 20,000.
On November 14, two F/A-18F crews were sent to investigate. Commander David Fravor and his wingman, Lt. Alex Dietrich, saw a patch of churning white water and, above it, a smooth white oblong with no wings, about the size of their own jets. As Fravor spiraled down toward it, it rose to meet him, then accelerated out of sight.
About ninety minutes later, Lt. Chad Underwood flew out and recorded it on his jet's infrared camera. That clip, released in 2017, is the famous FLIR1 video. Underwood also gave the object its nickname.