CBS Evening News With Norah ODonnell
Master bedrooms. >> excavation will be able to accelerate because of this. it had been inaccessible and a lot of people were sleeping at that time, unfortunately, in that part of it. >> reporter: the building's demolition could affect the investigation into the initial collapse. >> well, it just makes what we have to do a little bit more complicated. >> reporter: but investigators like allyn kilsheimer will also review photographs, including some that bring into question the layout of steel reinforcements in the building's concrete supports. >> it doesn't mean there weren't the right number th...
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