story. the young hikers we showed you these folks earlier in the week. they were missing for four days in kal to. we're learning more how they survived. >> i don't remember drinking anything. i know i ate dirt and tried to eat dirt and rocks. i came to hospital with a big mouthful of dirt ♪ (train horn) vo: wherever our trains go, the economy comes to life. norfolk southern. one line, infinite possibilities.