Two NASA astronauts ventured out on their second spacewalk in under a week Monday to complete a four-year effort to modernize the International Space Station's power grid, now equipped with batteries that store power collected by solar panels. (Feb. 1)

Subscribe for more Breaking News: http://smarturl.it/AssociatedPress
Website: https://apnews.com
Twitter: https://twitter.com/AP
Facebook: https://facebook.com/APNews
Google+: https://plus.google.com/115892241801867723374
Instagram: https://www.instagram.com/APNews/
​

You can license this story through AP Archive: http://www.aparchive.com/metadata/youtube/0e7a5724e1be43b2856e35b244f827ba