[USA] MU Engineering Researchers Designing Protective Wall to Shield Bridges from Terrorist Attacks / University of Missouri-Columbia, 5 June 2007
http://munews.missouri.edu/NewsBureauSingleNews.cfm?newsid=15367
Allyson Bailey
"Government officials have acknowledged the transportation system's vulnerability to terrorist attacks. Bridges are among the most vulnerable. So researchers are working with federal highway officials to develop a new technology that can protect bridges against such attacks.
The final results of the research will be available to transportation officials across the country."