The return of two astronauts, Butch Wilmore and Suni Williams, who flew to the International Space Station on Boeing's faulty Starliner capsule last summer, has hinged on the arrival of the Crew-10's four-person crew in order to keep the station's American contingent staffed at normal levels.

The NASA astronauts will answer questions about daily life up in orbit, as well as the research conducted in microgravity.