>> reporter: and most certainly many others on that train would have too. >> when asked how it felt to know that their son was an international hero, the parents of one of americans said he just knew what he had do. >> incredible story and we can't wait to hear also more of the firsthand accounts from those young men. that was press conference earlier and now we're expecting at any moment now they, too, will be going live and we'll of course take that. >> can't wait to listen. >> nick, thanks so much. you referred to the parents talking about these young men. earlier we heard from the father of one of the incredible heros, tony sadler. father of anthony sadler. listen. >> he called me very early on either from the site, the train site or from the police station. and the initial response was surprise and shock.