A massive new rock fall has hit Yosemite National Park, cracking with a thundering roar off the El Capitan rock formation, injuring one person and sending huge plumes of white dust surging through the valley floor below.

Dean Potter knew the risks every time he flew off a cliff in a wingsuit.

Extreme athlete Dean Potter, renowned for his bold climbs and BASE jumps, was one of two men killed while attempting a wingsuit flight in Yosemite National Park.