Participants gather around Rob Gibson's darkroom wagon, parked right next to the famous Cornfield, at the 2002 Antietam seminar.

One of the hallmarks of the Image of War Seminars, is gaining access to difficult locations. Here, attendees see the inside of the Bryan House on Cemetery Ridge at the 2003 Gettysburg seminar.

Seminar attendees don 3-D glasses during Bob Zeller's slide shoe at the 2002 Antietam seminar.

Battlefield guide Tim Smith leads a tour of Culp's Hill at the 2003 Gettysburg seminar.

Civil War photography scholar William Frassanito speaks to a group at Devil's Den at the 2003 Gettysburg seminar.

A visit to wet-plate photographer Rob Gibson's studio at the 2003 Gettysburg seminar.

Battlefield guide David Richards leads a Spotsylvania battlefield tour at the 2004 Fredericksburg Spotsylvania County seminar.

Wet plate recreation of the famous Massaponax Church Council of War series at the 2004 Fredericksburg Spotsylvania County seminar.

Recreation of the famous Massaponax Church photo series at the 2004 Fredericksburg Spotsylvania County seminar.

John Hennessy speaks to the group near the Sunken Road at the 2004 seminar at Fredericksburg Spotsylvania.

Wet-plate photo at Lee's Richmond Home at the 2005 Richmond seminar.

(from left) John Cummings, Tom Rinaldi, and John Richter pose for the wet-plate camera at Lee's Richmond Home at the 2005 Richmond seminar.

Wet-plate photo recreation at Lee's Richmond Home at the 2005 Richmond seminar.

Wet-plate photographer Rob Gibson and assistant Jason Wickersty at the 2006 Manassas/Washington DC seminar.

Rob Gibson shows the finer points of the wet plate process in front of Mathew Brady's studio at the 2006 Manassas/Washington DC seminar.

Wet plate image recorded at the 2006 Manassas/Washington DC seminar.

Wet plate image recorded at the 2006 Manassas/Washington DC seminar.

A just-exposed wet plate of a few attendees at the 2006 Manassas/Washington DC seminar.

Seminar attendees listen to Harold Holzer's presentation The Lincoln Family Album at the 2006 Manassas/Washington DC seminar.