Gettysburg 150th Anniversary: Gettysburg_017

Portraying a field surgeon, Dr. Jon Willen, 65, of Tarzana, CA poses for a portrait at Gettysburg National Military Park on Tuesday July 02, 2013 in Gettysburg, PA. People have flocked to the town to commemorate the 150th anniversary of the Battle of Gettysburg. The battle is considered a turning point in the Civil War. (Photo by Matt McClain/ The Washington Post)

Portraying a field surgeon, Dr. Jon Willen, 65, of Tarzana, CA poses for a portrait at Gettysburg National Military Park on Tuesday July 02, 2013 in Gettysburg, PA. People have flocked to the town to commemorate the 150th anniversary of the Battle of Gettysburg. The battle is considered a turning point in the Civil War. (Photo by Matt McClain/ The Washington Post)