Astronauts aboard the International Space Station have been told to prepare for urgent evacuation after an air leak. The breach, which is understood to have worsened, was occurring on the Russian segment of the station. All those aboard have been told to shelter in the spacecraft. A Russian crew member was understood to be attempting to fix the air leak. TRENDING Stories Videos Your Say Nasa has confirmed the leak is taking place on a portion of the orbital laboratory. The ISS is the largest hum