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NASA's Christina Koch. Photo: NASA/Bill Ingalls

NASA astronaut Christina Koch is back on Earth after spending 328 days in space, living and working onboard the International Space Station.

Why it matters: During her time in orbit, Koch participated in the first all-woman spacewalk and set a record for the longest continuous spaceflight by a female astronaut in history.

  • She and her fellow crewmates — the European Space Agency's Luca Parmitano and Russian cosmonaut Alexander Skvortsov — landed back on Earth in Kazakhstan at 4:12 a.m. ET.

The big picture: Koch's nearly yearlong mission is part of NASA's effort to learn more about how the human body responds to long duration spaceflight ahead of sending people to the Moon and eventually to Mars.

  • Scott Kelly is the only astronaut with a longer flight under his belt, with a mission that lasted 340 days.

By the numbers: According to NASA, Koch orbited Earth in 5,248 times during her months in orbit.

  • That equates to about 139 million miles traveled.
  • She also performed six spacewalks, spending 42 hours and 15 minutes outside of the station in total.

Go deeper

Off the Rails

Episode 7: Trump turns on Pence

Photo illustration: Eniola Odetunde/Axios. Photos: Elijah Nouvelage, Alex Wong/Getty Images

Beginning on election night 2020 and continuing through his final days in office, Donald Trump unraveled and dragged America with him, to the point that his followers sacked the U.S. Capitol with two weeks left in his term. Axios takes you inside the collapse of a president with a special series.

Episode 7: Trump turns on Pence. Trump believes the vice president can solve all his problems by simply refusing to certify the Electoral College results. It's a simple test of loyalty: Trump or the U.S. Constitution.

"The end is coming, Donald."

The male voice in the TV ad boomed through the White House residence during "Fox & Friends" commercial breaks. Over and over and over. "The end is coming, Donald. ... On Jan. 6, Mike Pence will put the nail in your political coffin."

Big Tech's post-riot reckoning

Photo illustration: Sarah Grillo/Axios. Photo: Tasos Katopodis/Getty Images

The Capitol insurrection means the anti-tech talk in Washington is more likely to lead to action, since it's ever clearer that the attack was planned, at least in part, on social media.

Why it matters: The big platforms may have hoped they'd move to D.C.'s back burner, with the Hill focused on the Biden agenda and the pandemic out of control. But now, there'll be no escaping harsh scrutiny.

34 mins ago - Technology

Why domestic terrorists are so hard to police online

Illustration: Eniola Odetunde/Axios

Domestic terrorism has proven to be more difficult for Big Tech companies to police online than foreign terrorism.

The big picture: That's largely because the politics are harder. There's more unity around the need to go after foreign extremists than domestic ones — and less danger of overreaching and provoking a backlash.