After 11 Friends Died, He Picked Up What They Left Behind. He Wasn't Prepared For What Followed.

A few seconds after Travis Williams said goodbye to his squad, his life changed forever.

People in the military face huge obstacles.

But we often forget casualties of war aren't the only obstacles they have.

When you look at the statistics for post-traumatic stress disorder, they're seriously shocking. And sad.

In fact, we should even say that PTSD is way more pervasive of a problem than getting physically hurt during war.

Besides PTSD, suicide is a huge problem among soldiers.

If that statistic doesn't shock you, take a look at this one.

Mental illness and suicide are systemic problems that deeply affect our military.

Marine Lance Cpl. Travis Williams was one of the many American veterans who suffered. Hear him tell his story.