NASA @NASA
This week on @Space_Station, two astronauts completed the first two spacewalks in a series to upgrade the station's batteries from nickel-hydrogen to lithium-ion. The next spacewalk continuing the work will be Wed., Oct. 16. Watch: https://t.co/XBIyJ90P1z Questions? Use #AskNASA! https://t.co/44cAMBlGtn — PolitiTweet.org