mother's laugh, living reminders that those who died are with us still. >> todd m. beamer. >> today we stand on this hallowed ground, a place made sacred by the passengers and crew of flight 93. >> mark bingham. >> for on a day such horrors, they gave us our first filmer of hope, how ordinary individuals, choosing to work together, can do the most extraordinary and history making things. ♪ >> shep: 11 years ago at this hour, the ruins of the twin towers were still smoldererring in lower manhattan. tonight we're getting a new look at the progress at the world trade center site.