Boeing Starliner stuck in space Technical glitches with the spacecraft have left two NASA astronauts, Butch Wilmore and Suni Williams, in limbo onboard the International Space Station Boeing Starliner crew module:Can be reused up to 10 times Jun 5: Wilmore (right) and Williams blast off – five helium leaks are detected during flight Service module Helium is used to pressurize fuel for thrusters Jun 6: Five of 28 thrusters fail – four restarted International Space Station 55m Zvezda Zarya Destiny Kibo Nauka Unity Columbus Harmony Thrusters Russian modules United Launch Alliance Atlas V Two-stage rocket with two solid-fuel boosters Starliner docked with Harmony module U.S. / European / Japanese modules Sources: Boeing, NASA Picture: Miguel J. Rodriguez Carrillo / AFP, Getty Images © GRAPHIC NEWS