US tornadoes: Fresh storms hit Mid-West

Another violent storm ripped through several central states killing at least 13 people and complicating rescue efforts in Joplin, Missouri.

Three days after a massive twister ripped through that town, leaving more than 120 dead, the search for survivors continues - while residents remain on alert for more storms to come.

Matt Frei reports.

Tornado footage courtesy holytornado.com