Oklahoman Ryan Dowling,... Pictures

Oklahoman Ryan Dowling, seen here in the back row, was among winners of the 2011 Innovation Challenge who rang the closing bell at the New York Stock Exchange on Jan. 27.PHOTO PROVIDED
Oklahoman Ryan Dowling, seen here in the back row, was among winners of the 2011 Innovation Challenge who rang the closing bell at the New York Stock Exchange on Jan. 27.PHOTO PROVIDED

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