Rise n’ grind – it’s spacewalk time. On March 13, NASA astronauts Victor Glover and Mike Hopkins will set their spacesuits to battery power at 12:30 UTC to mark the start of a 6.5 hour excursion outside the International Space Station. This is not the duo’s first rodeo. They’ll be building on system upgrades from their Jan. 27 spacewalk, as well as servicing the station’s cooling system and communications gear.