You're partially right. Soldiers returning are being helped with there physical injuries, yet follow up on mental issues(PTSD) is lacking. VA has a long wait list for past vets (6+weeks in some cases) and current returning vets are numerous with many problems associated with re-integrating back into american society. (i.e. failed marraiges, foreclosed homes, etc.)
Some people are saying that a ban on handguns/guns in Natl parks could have prevented this, BS, nothing was going to stop this guy from doing what he did. The Park rangers attempts to stop this guy from hurting anyone else was heroic, in my opinion. Say a prayer for everyone involved.