Mystery Sightings In The Sky Raise National Security Concerns | NBC Nightly News

There are more questions than answers about what appeared to be an upside down pyramid flying over a Navy destroyer off the California coast, and other images. The Pentagon confirms the images are being reviewed by a task force set to brief Congress on what they know about “unidentified aerial phenomenon.” » Subscribe to NBC News: » Watch more NBC video: NBC News Digital is a collection of innovative and powerful news brands that deliver compelling, diverse and engaging news stories. NBC News Digital features , , , Nightly News, Meet the Press, Dateline, and the existing apps and digital extensions of these respective properties. We deliver the best in breaking news, live video coverage, original journalism and segments from your favorite NBC News Shows. Connect with NBC News Online! NBC News App: Breaking News Alerts: