Two NASA astronauts conducted the first spacewalk of the year while working on a robotic arm.
Astronauts Scott Tingle and Mark Vande Hei, crew members of the Expedition 54 aboard the International Space Station (ISS), spent about 6.5 hours outside the space station.
The two astronauts replaced LEE-B with a spare that has been stored outside the ISS since 2009.
NASA Headquarters: Washington, D.C., United States
Founder: Dwight D. Eisenhower
ISS Headquarters: Copenhagen, Denmark
CEO: Jeff Gravenhorst
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