NASA astronauts Robert Behnken and Chris Cassidy have begun the first of two final spacewalks to finish a 3.5-year effort to upgrade the International Space Station’s power system. They will replace batteries on one of two power channels on the station’s far starboard truss (S6 Truss). The spacewalkers switched their spacesuits to battery power at …
Astronauts Have Begun Spacewalk Live on NASA TV
