RT @NASA: Today marks 15 yrs that humans have lived off the planet on @Space_Station nasa.gov/station15 #15YearsOnStation https://t.co/y1q5sUqgW0
RT @NASA: Today marks 15 yrs that humans have lived off the planet on @Space_Station nasa.gov/station15 #15YearsOnStation https://t.co/y1q5sUqgW0