Article Photos: The Grid: Wind power generation growing, but transmission lags 3/9

Ronald Robinson, a senior transmission and interchange system operator, works in the Tennessee Valley Authority's Regional Operations Center in Chattanooga, Tenn on Wednesday. exactly 10 years ago, a power blackout  cascaded from northeast Ohio to seven other states and parts of Canada, reaching 50 million people. <strong>John Rawlston - Associated Press</strong>