This data point is one of several key mysteries investigators are exploring as they seek to explain what caused the nation's worst air disaster in more than a decade, aviation experts said.

One clip, posted by X, formerly Twitter, user Tyler Anderson, shows the plane in the far distance in the night sky before it ...

More recent examples in this space include a demonstration in October 2022 of a Black Hawk flying autonomously to perform internal and external cargo resupply missions, as well as rescue operations.