NASA cancels ISS spacewalk due to spacesuit coolant leak for astronauts Dyson and Barratt.

NASA cancels spacewalk at ISS due to spacesuit coolant leak; astronauts Tracy Dyson and Mike Barratt were preparing to exit the space station for maintenance work, but the spacewalk was called off due to a water leak in Dyson's cooling unit. The leak occurred after the suits were switched to battery power before exiting the space station. The cooling unit in spacesuits is designed to keep astronauts comfortable during their work.