Detroit Free Press: Michigans U.S. senators want to know what steps federal regulators took to ensure that a 60-year-old pipeline crossing the Straits of Mackinac was safe before allowing millions of gallons of oil to flow through it each day -- and how quickly a leak could be detected and the line shut down.
Sens. Debbie Stabenow and Carl Levin sent a letter to the federal Pipeline and Hazardous Materials Safety Administrationtoday, raising the specter of another environmental disaster like the one that occurred...