NORFOLK, Va. — For the second quarter of 2013, Norfolk Southern reported net income of $465 million, 11 percent lower than $524 million for second-quarter 2012. Diluted earnings per share were $1.46, down 9 percent compared with $1.60 per diluted share in the same period last year. “In the second quarter, Norfolk Southern delivered solid results, supported by growth in our chemicals, intermodal, and automotive businesses, despite continuing weakness in the coal markets,” said CEO Wick Moorman. “We continue to focus on service efficiency and velocity, which is enabling us to control operating expenses and deliver superior performance to our