'Peggy I don't have a shield': ISS astronauts lose key piece of equipment – video

Cameras on the International Space Station have tracked a bag containing a debris shield as it sailed away and into the distance after it somehow became untethered from the station during a spacewalk. Nasa engineers determined it posed no safety threat to the astronauts or to the facility, a $100bn research laboratory that flies about 250m (402 km) above Earth.