There's no way to undo tragedy, no way to bring back what's irrevocably gone or fill the incalculably huge hole that results. I often lament the lameness of mere words at times like this, because they don't seem to tangibly change the fact that a plane fell from the sky and countless lives were either ended or forever altered.
But words are all I've got right about now, and those shared by a Brazilian author (who's inspired me previously) seem tailor-made to the way I'm thinking right about now:
"Tragedies do happen. We can discover the reason, blame others, imagine how different our lives would be had they not occurred. But none of that is important: they did occur, and so be it. From there onward we must put aside the fear that they awoke in us and begin to rebuild."