Staff Sgt. Caleb Dubourg, left, 436th Maintenance Squadron aerospace pulse technician, and Senior Airman Robert Money, right, 436th MXS aerospace journeyman, unload a wood railing to replace rotted sections of fence Oct. 10, 2014, at Gettysburg National Military Park, Pennsylvania. Volunteers helped to clear brush and replace wood railings on a 300-yard section of fence behind the Sherfy House. (U.S. Air Force photo/Airman 1st Class William Johnson)