By Samuel Greengard Answers Engineering for Forensic investigations translate into business opportunities for Member Firms A section of the concrete roadway in the center span of the Tacoma Narrows bridge crashed into the Puget Sound in Tacoma, Wash. on Nov. 7, 1940. High winds caused the bridge to sway, undulate and collapse under the strain. Thirteen people were killed when the I-35 West Mississippi River Bridge in Minneapolis collapsed in 2007. Forensic engineers helped discover the cause of the tragedy. ENGINEERING INC. NovEmbER / DECEmbER 2009