Marie Cusick

Marie Cusick covers New Yorkâââ

On the side of a mountain road in Pennsylvania's Tiadaghton State Forest, I'm trying to avoid a steady stream of heavy truck traffic. Acres of freshly cut tree stumps stretch out in front of me.

Kevin Heatley lives in the area and has come to these woods for years to hike. He's an ecologist by trade and he's concerned about what he's seeing.

This week marks the 150th anniversary of the battle of Gettysburg. While it's widely known as the critical turning point of the Civil War, the small Pennsylvania town has seen many other battles since then — over how the historic site should be preserved and remembered.