dozens were hurt. today the dead were identified as 74-year-old donald varnadoe and his wife 72-year-old marjorie. the georgia couple was celebrating their 50t 50th anniversary. and zach schneider, 28, of illinois, a green bay packers fan, he was traveling with his 26-year-old wife rebecca, who was unhurt. today, ntsb investigators combed the scene in search of clues to the cause of the crash. the train had been moving below the 79-mile-per-hour limit at the time of the accident. the tracks went through a regular inspection just two days earlier. >> we are not ruling anything out at this point. we have ruled everything in. >> reporter: late this afternoon, those cars that remained upright were rolled away. >> oh, my god it's on its side. >> reporter: social media captured the scope of the damage. railcars tossed on their side, passengers stranded, luggage scattered. >> i was laying down in my compartment on a bed, so,