Mid-air scares leave passengers on edge

Severe turbulence turning to sheer terror for passengers on a Turkish Airlines flight. One flyer posting her perspective on this flight from Istanbul to Tunisia this past week saying the plane tried to land three times before dropping. The stormy weather eventually forcing the pilot to land at a different airport. We're also learning about a safety threat on a Qatar Airways plane on Friday. You can see flight attendants working to restrain two men. The airline says they were involved in a physical altercation on a flight from Australia to Qatar. A witness telling our partners at 7 News Australia at least one of the men headbutted and spat on a crew member and claimed to have a gun. It took at least half a dozen people to finally restrain the pair with handcuffs and zip ties. Qatar Airways saying in a statement to NBC News, the safety and well-being of our crew and passengers remain our highest priority. The incident coming just days after this scary moment on an American Airlines flight from Dallas to Newark diverted to BWI Airport. TMZ sharing video of a man being duct-taped to his seat. Passengers said the man yelled racial and homophobic slurs before getting physical with other passengers. Maryland authorities charging Arthur Lundin with second-degree assault and disorderly conduct. Flight crews and passengers teaming up to respond to a growing number of scares in the skies. Aaron Gilchrist, NBC News.