In May 2011, a tornado ripped through Joplin, Mo., killing 161 people. As Joplin's residents make their way through the stages of grief, three families discuss how they survived and how they're preparing for the next one.
Today is a day of remembrance in Joplin, Missouri. It's been exactly one year since the nation's deadliest tornado in 60 years killed 161 people there.
