For years, NASA has had to rely on Russian vehicles to get astronauts to the International Space Station. That could soon change if the flight test of SpaceX's Crew Dragon capsule succeeds.
Kindergartners from Georgetown Day School in Washington D.C., help NPR's Lulu Garcia-Navarro field questions to McClain, who's an astronaut serving on the International Space Station.
A Russian, an American and a Canadian were aboard the spacecraft when it lifted off from Russia's Baikonur Cosmodrome in Kazkahstan. It's the first launch since a failed mission in October.
"We don't reject any theories," said Dmitry Rogozin, the head of Russia's space agency. That includes sabotage, though he suspects it was more likely a "technological error."
The Government Accountability Office released a report warning NASA that further delays in the space agency's commercial crew program could keep American astronauts from reaching the space station.
Sunita Williams was the second female commander of the International Space Station. Now, she says her new job working with private companies to develop space technologies feels like a new frontier.