Grand Canyon: Rivers of Time is a journey through time at one of the world’s greatest natural wonders. But how do astronauts train here on Earth to work in the microgravity of space … Grand Canyon: Rivers of Time As an astronaut, he was trained extensively for space walks.
NASA astronaut Chris Cassidy made the repair and saved the Space Station. In 2013, a critical life-support system on the International Space Station failed, requiring an immediate spacewalk to fix it.
