Relive the sobering exhibition of Alexander Gardner’s photographs taken on Antietam battlefield in September 1862 at the Missing Soldiers Office in 2018.

Relive the sobering exhibition of Alexander Gardner’s photographs taken on Antietam battlefield in September 1862 at the Missing Soldiers Office in 2018.

Relive the sobering exhibition of Alexander Gardner’s photographs taken on Antietam battlefield in September 1862 at the Missing Soldiers Office in 2018.

Relive the sobering exhibition of Alexander Gardner’s photographs taken on Antietam battlefield in September 1862 at the Missing Soldiers Office in 2018.

Relive the sobering exhibition of Alexander Gardner’s photographs taken on Antietam battlefield in September 1862 at the Missing Soldiers Office in 2018.

Relive the sobering exhibition of Alexander Gardner’s photographs taken on Antietam battlefield in September 1862 at the Missing Soldiers Office in 2018.

Relive the sobering exhibition of Alexander Gardner’s photographs taken on Antietam battlefield in September 1862 at the Missing Soldiers Office in 2018.

Relive the sobering exhibition of Alexander Gardner’s photographs taken on Antietam battlefield in September 1862 at the Missing Soldiers Office in 2018.

Relive the sobering exhibition of Alexander Gardner’s photographs taken on Antietam battlefield in September 1862 at the Missing Soldiers Office in 2018.

Relive the sobering exhibition of Alexander Gardner’s photographs taken on Antietam battlefield in September 1862 at the Missing Soldiers Office in 2018.