Jerry Bruckheimer was brought in to produce at a very late stage. The studio rejected the original cut due to poor reactions from test audiences. Extensive re-shoots, featuring new material written by Laeta Kalogridis, were helmed by Danny Cannon over two weeks, for a reported $15M.
Several cast and crew, even extras, noted that lead star/producer Gerard Butler did not appear to know many of his lines.
Some of the NASA scenes were filmed at the NASA facility in New Orleans, LA.