The Survivor Tree

Take a minute to watch this; it is very interesting:

http://www.history.com/videos/making-the-911-memorial-survivor-tree#making-the-911-memorial-survivor-tree

Here's the Word of the Day:

paralipsis \par-uh-LIP-sis\, noun:
The suggestion, by deliberately brief treatment of a topic, that much of significance is being omitted, as in "not to mention other faults."