It's been 12 years since the historic, deadly Moore, Oklahoma, EF5 tornado. New research has given light as to why no U.S.

An EF-5 tornado ripped through Moore on May 20, 2013, killing 25 people, including seven children, and injuring over 200 ...

You can see how a portion of the 2013 storm (green) overlaps the 1999 storm (red), which was an F5 tornado that did around 1.1 billion dollars in damage. 36 people died in that storm and 8,000 ...