New Delhi, May 31 -- During their space journey last year, NASA astronauts Sunita Williams and Butch Wilmore wondered whether they would have been able to 'make it back' home if their Starliner vehicle had not docked with the International Space Station (ISS).

Starliner's historic first test mission with NASA astronauts had issues docking with the ISS on June 6 after five thrusters (out of 28) in its reaction control system misbehaved.

Two months after safely landing on Earth, Butch Wilmore recalled the horror he and Sunita Williams faced when their Boeing Starliner capsule was detected with faults mid-journey.

Wilmore told BBC News that docking of the spacecraft with the space station was 'imperative'. But when the spacecraft endured ...