Florida exhorts residents to prepare and evacuate for destructive Hurricane Irma

Hurricane Irma is en route to Florida after battering islands across the Caribbean, and many areas across central and south Florida are already under mandatory evacuation. P.J. Tobia reports on how Floridians are preparing for the storm, then John Yang speaks to Ed Rappaport of the National Hurricane Center and Major Hector Llevat of the Miami-Dade Police Department.