Recommended reading (in no particular order) for anyone who wants a better understanding... 

The Warrior's Guide to Insanity, by Andrew Brandi, USMC

Once a Warrior, Wired for Life, by Bridget Cantrell and Chuck Dean

On Killing, by LTC David Grossman

On Combat, by LTC David Grossman

Moving a Nation to Care:  Post-Traumatic Stress Disorder and America's Returning Troops  by Ilona Meagher

War Trauma:  Lessons Unlearned from Vietnam to Iraq, by Raymond M Scurfield

Recovering from the War:  A Guide for All Veterans, Family Members, Friends, and Therapists, by Patience Mason

When You Ride Alone, You Ride with Bin Laden; What the Government Should be Telling Us to Help Fight the War on Terrorism by Bill Maher

Operation Homecoming:  Iraq, Afghanistan, and the Home Front in the Words of US Troops and Their Families, Edited by Andrew Carroll

Courage After Fire by Keith Armstrong, Suzanne Best, Paula Domenici

FLASHBACK: Posttraumatic Stress Disorder, Suicide, and the Lessons of War, by Penny Coleman

The Blog of War by Matthew Burden

Down Range:  To Iraq and Back by Bridget Canctrell and Chuck Dean

The Long Road Home:  A Story of War and Family by Martha Raddatz

Separated by Duty, United in Love:  A Guide to Long-Distance Relationships for Military Couples  by Shellie Vandevoorde

I Can't Get Over It:  A Handbook for Trauma Survivors by Aphrodite Matsakis

Waking the Tiger:  Healing Trauma, by Peter Levine

On Call In Hell:  A Doctor's Iraq War Story  by CDR Richard Jadick

My Men Are My Heroes by Sgt Major Brad Kasal

Jarhead, by Anthony Swofford

Back from the Brink:  A Family Guide to Overcoming Traumatic Stress, by Don R. Catherall, PhD

The Body Remembers by Babette Rothschild

Combat Stress Reaction:  The Enduring Toll of War, by Zahava Solomon