Enjoy.

Different subject:

Did you know that much of New York City’s underground train system is also below sea level? During the World Trade Center Recovery effort the one primary fear was that the so called bathtub, the retainer wall around the WTC complex, might cave inward and that would allow open sea water to rush in from the river and destroy, perhaps in a manner unrecoverable, the whole NYC Transit system.

Please watch this video about the Katrina Disaster and the cause of the flooding. It is poignant to say the least and we should keep it in mind that this could happen to New York City also.

Here is the direct link to the video.
http://www.youtube.com/watch?v=wln_iq5bc8k