It's also difficult to believe that no-one knew about his state of mind. Although, it would seem, from thinking about the many mass-shootings (that occur in the USA), that family and close associates tend to overlook some of the signs of something wrong.
It also awakens suspicions about the fate of MH370.
But there are more (even one is too many):
*November 2013, Mozambique Airlines Flight TM470 crashed in Namibia, killing 33 people on board. Investigators initially couldn't figure out why the plane had crashed, since the weather was so nice.
But as the International Business Times reported, the plane's black box recorder offered some disturbing clues. The co-pilot had left the cockpit for the bathroom only to find that the door was locked when he returned. The pilot then altered the autopilot to bring it to below ground level and manually switched it to maximum speed. Someone was pounding on the cockpit door as the plane went down. The pilot never once called for help.
*In 1999, EgyptAir Flight 990 crashed near Nantucket, Massachusetts, killing 217 people. Before the crash, the plane's pilot had apparently excused himself to go to the bathroom. The black box recorder then picked up unintelligible commotion and banging on the door. The co-pilot, Gamil El Batouty, could be heard muttering over and over, "I rely on God. I rely on God. I rely on God. I rely on God." The captain eventually forced his back way in and could be heard saying, "What is this? Did you shut the engine[s]?" As the plane crashed, the captain was heard trying to right the plane, saying, "Pull with me. Pull with me."In the EgyptAir case, the NTSB concluded that the crash occurred because of the co-pilot's "manipulation of the airplane controls." But they did not explicitly call it suicide, and Egyptian officials have disputed that it was deliberate.
*In December 1997, Silk Air Flight 185 crashed in Indonesia, killing 104 people on board. Indonesian authorities weren't sure exactly what had happened, though US investigators suggested the captain may have switched off the flight recorders and caused the plane to dive — possibly after his co-pilot had left the cockpit. At the time of the crash, investigators noted, the pilot had been experiencing significant financial difficulties and had work-related problems.
Link: http://www.vox.com/2015/3/26/8294971/pilot-suicide-crash
And, what do we do to protect ourselves ??????