I promised in my last blog that it would be the last one. Expert bridge engineers from the National Transportation Safety Board and other organizations are investigating the accident. The engineering firm, MCM-Fiff, FIU, FDOT and other organizations have stated that they will fully cooperate. I have devoted a separate page on my site to the engineering aspects of the accident, which will be updated periodically. At this point, video footage shows the first collapse occurred about 25-ft from the north pylon.