my heart is broken. it's broken. she was my best friend. >> we have some stunning new video to show you. you have to look at this. this is a construction worker trapped on a ledge as the building he was working on goes up in flames. what does he do? he managed to swing himself on to a lower ledge. that's the ledge he is on right now. firefighters hosted the ladder to rescue him. just after he got on there, you can see the whole wall comes tumbling down there. authorities say the worker was not hurt. they say the strong winds fueled this five-alarm fire. the cause under investigation. that's a miracle. >> it could have been a very different scenario playing out there. >> investigators believe that mechanical failure played a role in monday's commuter crash. a train crash. the train jumped the tracks and slammed into an escalator.