Video: Arizona hiker dies after falling from Yosemite's Half Dome trail

The 29-year-old was scaling the steepest part of the trail Thursday when she fell more than 500 feet down the rocky terrain. Park spokesman Scott Gediman says 29-year-old Danielle Burnett, of Lake Havasu City, Arizona, was scaling the steepest part of the trail Thursday when she fell more than 500 feet down the rocky terrain.