U.S. Markets closed
9 / 50

Wildfires threaten Yosemite

An air tanker drops fire retardant on a ridge ahead of the advancing Rim Fire on August 22, 2013 in Groveland, California. (Photo by Justin Sullivan/Getty Images)

Wildfires threaten California's Yosemite park

One of the largest California wildfires in decades roared largely

unchecked for a 10th day.