they ve been buttressing the side of it to create more stability and we watched as that excavator over my shoulder was taking chunks of the building out and perhaps the weight and it s not entirely clear why they were doing that and at any point that building can go and all of these workers are valiantly walking through and trying to plunder through the debris and massive piles of what they find. and massive into the courage as there are so many families depending on some resolution. andrea? the heroism and the resilience of the family is extraordinary. we want to focus on that rescue operation any bring in former fire chief downey and now chairs the urban search and rescue for the international fire chiefs association. thanks very being with us. the video is just heartbreaking and stunning. how are these teams going to work under these conditions?