The transition from military to civilian life often leaves veterans who have seen combat feeling numb and distanced from society.
The Veterans Administration says that 27 percent of returning veterans experience sustained PTSD, which can lead to violence and depression.
Adam Parnell saw horrible things guarding a gate in Kandahar Province in Afghanistan. Returning home, he was hospitalized in a mental ward after threatening suicide. He is 100 percent disabled with PTSD. Starting a family has given him comfort, but he still lives with the symptoms every day.