The Obamas pose for a picture with the author at the grave of his friend Tyler Parten at Arlington National Cemetery in 2011. | Courtesy of Erik Edstrom

The Obamas pose for a picture with the author at the grave of his friend Tyler Parten at Arlington National Cemetery in 2011. | Courtesy of Erik Edstrom
The Obamas pose for a picture with the author at the grave of his friend Tyler Parten at Arlington National Cemetery in 2011. | Courtesy of Erik Edstrom