From the producers of "Dateline," NBC's new series "Survival Mode" will give viewers an inside look at some of the largest and most recent disasters through accounts from those who lived through them.

The tornado that hit Joplin, Missouri, on May 22, 2011, was determined to be an EF-5. The twister was on the ground for at least 32 minutes and claimed the lives of at least 158 people. Severe weather ...