The reconstruction of a $13.5 million runway at a Massachusetts airport will be made of concrete to better accommodate F-15 fighter jets. "The runway has had repairs, but as we transitioned from an A-10 base to the heavier F-15s that use afterburners, a harder toll was taken on the runway," said Col. Peter T. Green, aircraft maintenance group commander for the 104th Fighter Wing. "We’re going from lots of asphalt to concrete in key areas that will be able to take the punishment of the F-15s."