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The follow-ups from Minneapolis on the I-35 bridge consisted more of filling in the blanks of previous reporting rather than providing new breaking developments. No more bodies have been retrieved from the Mississippi River so searchers have concluded that the eight still missing must be underneath the rubble. CBS' Bianca Solorzano showed us cranes and heavy equipment arriving as the FBI used hi-tech helicopter photography to draw a 3-D map of the wreckage. ABC's Mike von Fremd looked back at what may have triggered the collapse. He zeroed in on a highway repair crew on the bridge at the time: "Construction workers were using heavy trucks on the bridge, carrying tens of thousands of pounds of crushed stone." NBC's Lee Cowan peered down from a neighboring bridge and mused that "it seems impossible" that two thirds of the motorists just walked away from a 60-foot plunge. He asked Professor James Kakalios of the University of Minnesota to explain: the steel supports underneath the roadway cushioned their fall "almost like an airbag."
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