Battlefield guide Les Fowler gives a tour of Spangler farm which served as a field hospital during and after the July 1-3 1863 battle in Gettysburg, Pa., a turning point in the Civil War. (AP Photo/Nancy Nussbaum)

Battlefield guide Les Fowler gives a tour of Spangler farm which served as a field hospital during and after the July 1-3 1863 battle in Gettysburg, Pa., a turning point in the Civil War. (AP Photo/Nancy Nussbaum)