up. >> i would love to believe i could do that, chris, but i don't think it is possible for most of us mortals. those three guys were made of a different stock. we are so proud of them here today. meanwhile, chris, there was a new york social worker on that train to paris and witnessed the horror of the attempted attack. christina coombs joins us now with more. how are you feel sng. >> exhausted. exhausted. >> i can imagine. this is overwhelming. let's go back to the beginning. what were you doing on the train to begin with? >> i had been on vacation in europe for the first time ever, which is extremely exciting for me and i was happy about it. i was traveling with a good friend of mine through italy and then amsterdam and then we parted ways in amsterdam. he went to berlin and i was to go to paris. >> you were on that train alone? >> yes. >> at what point during your ride did you realize something was unfolding?