Outbreak of dangerous weather hits U.S.

A multi-day severe storm threat widened to more than 100 million Americans. In addition to tornadoes, forecasters are looking out for hail storms, damaging winds and temperatures soaring into the triple digits. Tom Hanson reports.

A multi-day severe storm threat widened to more than 100 million Americans. In addition to tornadoes, forecasters are looking out for hail storms, damaging winds and temperatures soaring into the triple digits. Tom Hanson reports.

A multi-day severe storm threat widened to more than 100 million Americans. In addition to tornadoes, forecasters are looking out for hail storms, damaging winds and temperatures soaring into the triple digits. Tom Hanson reports.