US astronauts to become first twins in space
Two US astronauts may become the first twins to be flying in space at the same time.
If all goes as scheduled, Mark Kelly will be commanding the space shuttle Endeavour as it docks with the International Space Station in February next year.
His twin brother, Scott, will be there to greet him, in his role as commander of the mission on board the International Space Station.
Stephanie Holmes reports.