According to the ABC news, another jet-liner was hi-jacked in the Middle East.

To fly big passenger airliners calls for long training and experience.

A passenger airplane took off for the USA.

The pilot of an airliner is responsible for the safety of passengers.

In the case of commercial airplanes, private companies compete to sell their product.

Crashes in the early days of commercial jets tended to be caused by technical faults, such as metal fatigue in the airframe or engines.