Yosemite fire: 2000 year old giant sequoias threatened

A huge fire in and around California's Yosemite National Park has continued to spread and now covers almost 250 sq miles (650 sq km), officials say.

The blaze is also threatening thousands of homes and some of California's renowned giant sequoia trees.

Don Neubacher, Superintendent of Yosemite National Park explains how fire crews have contingency plans to ensure that there are no high intensity burns.