The great mass of U.S. troops that once fought in Iraq are now gone, and the military is winding down an almost 12-year engagement in Afghanistan. But as the nation moves past those two very difficult wars, many veterans are still dealing with the wounds, both physical and psychological.

Some are doing what warriors have always done, writing about their experiences.

Matt Gallagher is a former Army captain who served 15 months in Iraq. He's one of the 15 men and women whose lives were affected by war and who contributed to the new book, "Fire and Forget, Short Stories from the Long War."