Kevin and Joyce Lucey remembered their son, Jeff, in an interview with StoryCorps in Wellesley, Mass. Jeff, a U.S. Marine, took his own life months after returning from a deployment in Iraq. StoryCorps hide caption

itoggle caption StoryCorps

This image, posted on a militant website, shows an Islamic State fighter waving a flag from a captured government fighter jet in Raqqa, Syria. The Islamic State captured the city in northeastern Syria last year and it has effectively served as its capital. Uncredited/AP hide caption

itoggle caption Uncredited/AP

Soldiers fill a hole left by an explosion on a road outside Beiji, Iraq, in 2005. In his debut novel, Michael Pitre follows a group of Marines doing similar work on Iraq's highways. Ryan Lenz/AP hide caption

itoggle caption Ryan Lenz/AP

Vance, who serves as a coach, founded the group after his own struggle with PTSD. He says it helped him get out of a dark place. He now has a degree in social work. David Gilkey/NPR hide caption

itoggle caption David Gilkey/NPR

Mark Pierce enlisted in the military in 1970, served in Vietnam and retired in 2010. Years later, his two sons also joined the armed forces. Courtesy of Mark Pierce hide caption

itoggle caption Courtesy of Mark Pierce

Volunteers at the Maryland Food Bank in Baltimore sort and box food donations on a conveyor belt. The bank started working with groups like the USO in 2013 to provide food aid to families affiliated with nearby military bases. Pam Fessler/NPR hide caption

itoggle caption Pam Fessler/NPR