A wildfire in Northern California is threatening three small towns. Thousands of homes have been evacuated as the Ponderosa fire is growing larger. The fire has burned more than 25 square miles and is just 30-percent contained. Nearly 19-hundred firefighters are battling the blaze just north of Sacramento, the blaze has devoured more than 16,000 acres and destroyed seven homes....more are on its path. Firefighters have taken the fire fight to the air, but heavy smoke has hampered their efforts.