Families of the people on board Malaysian Airlines Flight 370, are very worried about when and where this plane will be found, why it went down, and will any of their family members on board be found alive somewhere.  Will people of these members on board, the company, or even people of the U.S.A ever figure this out?  People may never know. 
Malaysian Airlines is a airplane company.  Malaysian Airlines had Flight 370 flying from Kuala Lumpur, Malaysia to Beijing, China.  Flight 370 was flying over the Indian Ocean when the Malaysian Airlines Control Tower received weird readings for where the plane was at.
Flight 370 went off course.  Before the 370 flight had went off course the pilot had said some last words before the flight made an off course left turn.  These words were, “Good night Malaysian three seven zero.” 
Many people believe that because of this statement that the disappearance of Malaysian Airlines Flight 370 was a terrorist act, by either the pilot or somebody on board that was making the pilot say these words. 
Nobody is 100% sure if this is correct, but that is what researchers, and government officials are leaning towards of why the flight went down.