Boeing's Starliner spacecraft's first crewed mission delayed to May 21 due to helium leak in service module.

Boeing's Starliner spacecraft's first crewed mission has been delayed again due to a small helium leak in the service module, now rescheduled for no earlier than May 21. The spacecraft, aimed at providing NASA with a second US spacecraft capable of ferrying astronauts to and from the International Space Station, has faced multiple delays and cost overruns. The latest issue concerns a leak in the spacecraft's service module, which is traced to a flange on a single reaction control system thruster.