[youtube http://www.youtube.com/watch?v=player_embedded&autoplay=0] [youtube http://www.youtube.com/watch?v=r2dRQHJ-aAk&autoplay=0] SANTIAGO DE COMPOSTELA, Spain | Thu Jul 25, 2013 8:41am EDT (Reuters) – Police put the driver of a Spanish train under investigation on Thursday after at least 78 people died when it hit a sharp bend at…