Charles Winstead was scaling the 3,000-foot granite wall of El Capitan in Yosemite Valley this week when an unfamiliar flapping sound erupted overhead and startled him. BASE jumping, the sport of leaping from fixed objects like buildings or cliffs and then parachuting to the ground, was pioneered in Yosemite National Park in the 1970s. While it has been effectively verboten there since the 1980s, BASE has continued to occur in secret. Read more at the link in our bio. A small group of BASE jumpe

Popular climber and influencer Balin Miller plunged to his death from Yosemite's El Capitan. The 23-year-old was reportedly livestreaming on social media with hundreds watching when the tragedy unfolded. Whit Johnson reports. | ABC World News Tonight with David Muir