Tragedy struck this week when a plane crashed in the city of Ahmedabad just shortly after takeoff, leaving investigators and aviation officials with many questions.

There have been cases of a very small number of survivors in very serious accidents, but it is "very rare" for there to be only one, a professor told Newsweek.

A large Air India passenger jet crashed in the western Indian city of Ahmedabad, shortly after taking off for London on June 12. Here's what to know.