The flight is meant to take two US astronauts — Butch Wilmore and Suni Williams — up to the International Space Station (ISS), where they plan to dock at 1:50PM ET tomorrow, June 2nd (NASA will live stream this, as well). Wilmore and Williams will stay on the station for a week to carry out testing of Starliner and its subsystems prior to NASA’s final certification of the craft for rotational missions to ISS.

Starliner is part of NASA’s Commercial Crew Program, which sees the agency works with private companies to develop novel spacecraft. SpaceX is also part of this program and has launched NASA astronauts since 2020.