back to our breaking news out of mexico city. crews have been working around the clock scrambling to save a 12-year-old little girl they believe is still alive. her voice heard underneath the rubble. i want to check back in with cnn's miguel marquez in mexico city. so what's the latest? >> reporter: well, we're in the same situation we were earlier. i'm whispering because they've called for silence. it seems every time we're about to go live they call for silence. we've had this many, many times an hour just down this way. now we're actually back to normal volume. they've called off whatever moment of silence so that rescuers could listen very intently to the area where they are searching. what they believe they have done is found -- figured out where the little girl is using thermal imaging. they say it is possible that there are others down there with