neighborhood, the freedom tower. world trade center one. the firehouse on duane street is busier than ever. only a handful from 9/11 are still there. one of them is john. >> the new guys coming on are just as good as the guys we had before. they're so eager to learn and work. now i'm one of the old guys in a firehouse. >> there's nothing like getting on a rig, hauling down broadway with lights and sirens. johnny mack, as he's called in the firehouse, had been there for eight years on september 11, 2001. >> it was just a terrible day and it's tough being the hero. that's why i don't like that whole thing and whatever anybody says about that. we were there. we saw it firsthand. for me, the best thing i ever did was stay at the firehouse and stay down there. i think that was my therapy. a lot of guys after 9/11 had a