Data from a cockpit voice recorder of the Black Hawk helicopter that collided with an airliner near Washington, D.C, last week suggests the crew was wearing night-vision goggles. "Please remain seated" is a common announcement heard over a plane's loudspeaker after landing — and it's oft ignored.

A passenger who appeared to be experiencing a mental health crisis punched out the plexiglass of a window mid-flight.

A crazed Frontier Airlines passenger was restrained by a group of fellow travelers with makeshift restraints after repeatedly punching the seat in front of him before then cracking a window with his foot.