SOURCE 1
Tornado's
http://www.nssl.noaa.gov/edu/safety/tornadoguide.html 1992-2010
Found October 11,2010
SOURCE 2
Encyclopedia
http://www.encyclopedia.com/topic/hurricane.aspx 1995-2010
Found October 11,2010
SOURCE 3
NASA
http://www.nasa.gov/ 1999-2010
Found October 11,2010
SOURCE4
CNN
http://www.cnn.com/video/?/video/tech/2010/09/26/armstrong.tech.comp.cnn 1994-2010
Found October 11,2010
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