NASA has announced the postponement of Boeing's first crewed space flight, following a data review which saw United Launch Alliance (ULA) decide to replace a pressure regulation valve on the Atlas V rocket’s Centaur upper stage. The Flight Test will now aim to launch no earlier than 6:16 p.m. EDT Friday, May 17, to the International Space Station. Boeing is aiming to become the second private firm to provide crew transport to and from the ISS after SpaceX became the first in 2020.






