Two brother have set a new American record for the longest highline ever walked.
Moises and Daniel Monterrubio walked 853 meters on a line which was 487m above ground. It took the two daredevils 37 minutest to go from one side to the other.
The two brothers are from San Francisco. They spent nearly a week stringing a single line from Taft Point west across a series of gulleys that drop 487m in Yosemite National Park.
Highlining is a type of slacklining (which has less tension than a tightrope) done at high altitude.
It involves stringing a narrow strip of strong, nylon webbing between two anchor points and using it as a kind of balance beam. The highline is typically an inch wide and a few millimeters thick.
Walkers wear a waist-harness that links to a steel ring. This means meaning that if they fall they will still be attached but have to haul themselves back up.
The group received permission from the national park before completing the stunt.