The loss of the space shuttle Columbia in February of two thousand three led to an investigation by the Columbia Accident Investigation Board.
VOA: special.2009.12.30
The space station crew has been limited to two full-time residents since last year's suspension of spaceshuttle flights in the wake of the Columbiaaccident.
To meet this goal, we will return the spaceshuttle to flight as soon as possible, consistent with safety concerns and the recommendations of the ColumbiaAccident Investigation Board.