On a routine flight from Kuala Lumpur Malaysia to Beijing in China, a Boeing 777, operated by Malaysian Airlines as flight MH370 simply dropped out of the sky, never to be heard from again. About a year or so passed before debris started washing up on the French island of Reunion. Recently though there have been 2 discoveries, the first on the island of Mauritius, and the other off the coast of South Africa. Both discoveries have been confirmed as wreckage from Flight MH370, and proof that the plane went down in the area that they thought it did. Sadly it is unlikely that we will ever know the cause of the crash, since it will be really hard to find the black boxes from this flight.
To Conclude the MH370 crash is one of the worst disasters in modern aviation history, and it is one of the few that is unlikely to be solved anytime soon.