“ It’s not like there’s a failure high and it pancaked down.” The early examinations came as rescuers Sunday spent a fourth day pushing through the enormous heap of debris created when half the 13-story building, Champlain Towers South, fell away early Thursday.... There was something very, very wrong with this situation.” The National Institute of Standards and Technology, a federal agency, was sending scientists and engineers to do a preliminary review, hoping to identify and preserve materia