The 2011 Joplin, Missouri tornado caused destruction and death like no other tornado in more than 60 years.
This particular tornado is the seventh deadliest in U.S. history, killing 158 people.
It was a large EF-5, and it travelled through a highly populated area -- a bad combination.
May 22 was the second of a six-day severe weather outbreak, including hundreds of tornadoes and even more reports of hail and wind damage.
During those six days, a deep trough in the upper levels of the atmosphere slowly moved east while at the surface, a low pressure system and a cold front traveled right along with it.
This caused tornadoes, hail, and wind across the Central Plains initially before moving into the Midwest.
People across the middle of the country saw a lot of damage and lost a lot during that week, but no one lost more than Joplin.
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