http://teacher.scholastic.com/activities/wwatch/tornadoes/images/tornado_map.jpg
http://library.thinkquest.org/03oct/01751/images/talley.jpg
http://wiki.answers.com/Q/What_is_the_difference_between_a_cyclone_and_a_tornado
http://library.thinkquest.org/C003603/english/tornadoes/whatisatornado.shtml
http://www.windows2universe.org/earth/Atmosphere/tornado/formation.html
