A visitor inspects the new CNG trucks at the ribbon-cutting event as SUPERVALU unveils the region's largest natural-gas-powered truck fleet and fast-fuel CNG station at the company's distribution ... more 
A visitor inspects the new CNG trucks at the ribbon-cutting event as SUPERVALU unveils the region's largest natural-gas-powered truck fleet and fast-fuel CNG station at the company's distribution center, on Friday, Dec. 6, 2013 in Mechanicsville, Va. The conversion to natural gas will cut the company's fuel consumption, lower greenhouse gas emissions and reduce operating costs. (Photo by Kevin Wolf/Invision for SUPERVALU Inc./AP Images) less 
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Associated Press
Fri, Dec 6, 2013 3:36 PM EST