we opened the show, that one young boy ten years old paying tribute to his father whom he had never met and that is so true for so many children, more than 3,000 children lost a parent on 9/11/2011 and now today they come here to remember and to mourn. one way of reflecting on that day is with the images captured of the horrific events. to do that we have some before and after photos to share with you. here you see some crowds fleeing for safety as the south tower falls. these images have become iconic. their faces say it all. and here is the same street today. look at that. one world trade center rising upward in the background. this here is a subway entrance across from ground zero after the towers fell. every inch covered in thick