http://www.redcross.org/prepare/disaster/tornado
http://topics.time.com/tornadoes
http://www.therichest.com/expensive-lifestyle/location/top-10-deadliest-tornadoes-in-world-history/
http://www.disastercenter.com/guide/tornado.html
http://www.ustornadoes.com/2013/05/22/joplin-missouri-ef5-tornado-may-22-2011/
http://www.stormtrack.org/forum/archive/index.php/t-716.html
http://www.mb.ec.gc.ca/air/summersevere/ae00s09.en.html
http://www.nssl.noaa.gov/edu/safety/tornadoguide.html-
http://www.accuweather.com/en/weather-news/the-difference-between-tornado-1/61817
http://lifehacker.com/5976362/the-complete-guide-to-what-to-do-before-during-and-after-a-disaster#tornadoes
http://www.ustornadoes.com/2014/03/18/the-tri-state-tornado-of-1925/
http://prezi.com/k8ig8kfvdqyh/top-10-deadliest-tornadoes/
http://www.joplinmo.org/DocumentCenter/View/1985
http://www.philanthropynewsdigest.org/news/joplin-tornado-relief-efforts-raise-39-million
weebly.com
weather.com
therichest.com
Tornadoes- by Jean Allen
Published by Capstone books 2001
Tornadoes- by Andrew A. Kling
Published by Lucent books 2002
http://topics.time.com/tornadoes
http://www.therichest.com/expensive-lifestyle/location/top-10-deadliest-tornadoes-in-world-history/
http://www.disastercenter.com/guide/tornado.html
http://www.ustornadoes.com/2013/05/22/joplin-missouri-ef5-tornado-may-22-2011/
http://www.stormtrack.org/forum/archive/index.php/t-716.html
http://www.mb.ec.gc.ca/air/summersevere/ae00s09.en.html
http://www.nssl.noaa.gov/edu/safety/tornadoguide.html-
http://www.accuweather.com/en/weather-news/the-difference-between-tornado-1/61817
http://lifehacker.com/5976362/the-complete-guide-to-what-to-do-before-during-and-after-a-disaster#tornadoes
http://www.ustornadoes.com/2014/03/18/the-tri-state-tornado-of-1925/
http://prezi.com/k8ig8kfvdqyh/top-10-deadliest-tornadoes/
http://www.joplinmo.org/DocumentCenter/View/1985
http://www.philanthropynewsdigest.org/news/joplin-tornado-relief-efforts-raise-39-million
weebly.com
weather.com
therichest.com
Tornadoes- by Jean Allen
Published by Capstone books 2001
Tornadoes- by Andrew A. Kling
Published by Lucent books 2002