Dr. Maurice Pickard welcomes author Scott McGaugh to discuss the subject of his book "Surgeon in Blue: Jonathan Letterman, the Civil War Doctor Who Pioneered Battlefield Care." Through their discussion, listeners will discover how one lone surgeon, Jonathan Letterman, reshaped military medicine over the course of four major Civil War battles and a single year. Letterman, confronted by thousands of wounded lying abandoned on the battlefield, a sickly and malnourished Union army, and obscenely filthy military camps, took steps that make battlefield survival possible for our soldiers today.