Continuity mistake: When Scott and Virgil are performing the rescue operation, watch the position of Blanche Carter. When we see her she is sitting down unconscious near the bench where Tommy is lying, but just a few shots later she is standing up next to Joe, and then later she is sitting down unconscious again.
Continuity mistake: In the Thompson Tower at one point, Blanche and Tommy are sitting on a bench whilst Joe keeps hitting the steel door. When the Tower Control assistant switches on the television, he says "How did they get in there?" and we see a picture of the family. This time, it's a different picture to the one seen before as Blanche and Tommy are not sitting on a bench, and Joe is nowhere near a steel door.