In a news conference held from orbit, NASA test pilots Butch Wilmore and Suni Williams expressed their confidence in Boeing's Starliner space capsule, assuring that they believe it can safely return them to Earth. The astronauts, who should have already been back home weeks ago, have faced several challenges during their extended stay at the International Space Station.

Wilmore and Williams became the first individuals to ride aboard Boeing's new Starliner capsule when they launched early last month. However, helium leaks and thruster failures during their journey threatened their arrival at the space station and caused a significant delay in their return plans.

Despite the setbacks, both astronauts remain positive about the capabilities of the spacecraft. Williams expressed her belief that the spacecraft will bring them home without any issues, instilling confidence in their safe return. The extra time in orbit has allowed them to contribute and assist the station crew, an experience they are appreciating.

Boeing and NASA are currently conducting tests to replicate the thruster problems that occurred during the Starliner's approach to the space station. The new tests are being carried out at White Sands Missile Range in New Mexico, one of the designated landing sites in the western United States. The propulsion system, responsible for maneuvering the spacecraft, is under scrutiny, as five thrusters failed during the capsule's journey on June 6, a day after liftoff. However, four of the thrusters have been successfully reactivated, and Wilmore believes there are enough working thrusters to safely maneuver them out of orbit. In case of any issues, there are larger engines available as backup.

Wilmore emphasized the importance of the ongoing tests, stating that failure is not an option and expressing trust in the data gathered to ensure a safe return. NASA and Boeing consider the ground tests crucial in identifying and resolving any problems that may have occurred within the disposable section of the capsule, known as the service module, which is discarded before landing. The helium leaks are also located in this section.

NASA initially commissioned Boeing's Starliner and SpaceX's Dragon capsules a decade ago to facilitate astronaut flights to and from the International Space Station. SpaceX successfully completed its first manned mission in 2020, while Boeing faced repeated delays due to software and other technical issues for its crew flight.

As the tests continue, the astronauts remain optimistic about their return to Earth aboard the Starliner capsule. Their confidence in Boeing's spacecraft and the ongoing efforts to resolve the issues are testament to the determination to ensure the safety of all astronauts involved in future missions to space.