Yosemite wildfire: Firefighters gaining ground

      |After 10 days of battling a huge wildfire in and around Yosemite National Park, firefighters are finally gaining some ground. The most dangerous of all the western fires is now 20 percent contained, and officials say the threat to San Francisco's water and power supply is becoming less of an issue. Teresa Garcia reports from the scene in Tuolumne City, Calif.