It's July 15th. This day in 1863, photographer Timothy O'Sullivan has taken a photo of dead soldiers at Gettysburg called "A Harvest of Death." It would become one of the most famous photos in American history -- and O'Sullivan would soon be contracted to travel west and photograph the American frontier.

Jody, Niki, and Kellie are joined by writer Robert Sullivan to talk about "A Harvest Of Death" and why Sullivan is so drawn to the work of Timoth O'Sullivan.

Robert Sullivan's new book is available now -- it's called "Double Exposure: Resurveying the West with Timothy O'Sullivan, America's Most Mysterious War Photographer"

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Our team: Jacob Feldman, Researcher/Producer; Brittani Brown, Producer; Khawla Nakua, Transcripts; music by Teen Daze and Blue Dot Sessions; Audrey Mardavich is our Executive Producer at Radiotopia