There is an interview in the NYT with 2 former navy pilots who were ordered in 2004 to chase an unknown aerial vehicle that descended from 80,000 feet to roughly 20,000 feet and maneuvered in an unconventional way.
It's a paywalled article so I won't post it here but their paywall is crappy so you can read by opening the link in an incognito tab (chrome) or private tab (FF).
https://www.nytimes.com/2017/12/16/...ing-object-navy.html?partner=rss&emc=rss&_r=1
The Navy has released some of the videos and the times was showing this one earlier.
It's a paywalled article so I won't post it here but their paywall is crappy so you can read by opening the link in an incognito tab (chrome) or private tab (FF).
https://www.nytimes.com/2017/12/16/...ing-object-navy.html?partner=rss&emc=rss&_r=1
The Navy has released some of the videos and the times was showing this one earlier.