Correction: Southern's Big Bet story - Article Photos 4/6

In this Nov. 13, 2012 photograph, progress can be seen on the utility bridge in the gas cleanup and byproducts area of the plant at Mississippi Power's Kemper County energy facility near DeKalb, Miss. The plant, still under construction and designed to use a soft form of coal called lignite in a gasification process to generate power, has come under challenge by the Mississippi Sierra Club that says the gasification technology is expensive and unproven. (AP Photo/Rogelio V. Solis)