article_snippet: According to the PTSD Alliance, more than 13 million Americans have PTSD and the societal cost is in the billions.
article_snippet: As one might expect, service members are hardest hit.
article_snippet: The Department of Veterans Affairs estimates 30% of all Vietnam vets have experienced PTSD.
article_snippet: Among troops recently deployed to Iraq and Afghanistan, PTSD can run as high as 20% in any given year.
highlights_snippet: More than 13 million Americans have PTSD .
  