Caldor Fire expands overnight as crews scramble to protect South Lake Tahoe
California's massive Caldor wildfire, burning near South Lake Tahoe, is gaining ground on the popular resort community. Currently, it's burning an area larger than New York City and is only 23% contained. CBS News correspondent Carter Evans has an update on the firefighting efforts. Then fire historian Steve Pyne, author of "The Pyrocene," joins CBSN's Tanya Rivero to discuss why this year's fire season differs from others.