Spacewalking astronauts tackle battery work outside station

NASA's chief astronaut, Christopher Cassidy, said from Mission Control that sticky bolts often stymie astronauts, so everyone was grateful to hand over the chore to Dextre. Riding on the end of the station's robot arm, Dextre and its 11-foot arms also made easy work of the battery transfers from one end of the station to the other, a distance spanning approximately half a football field.