Decade of War Takes Major Physical, Mental Toll on U.S....

Aired: 9/11/2011 | 0:10:02 | Clip
Millions of Americans have served in the all-volunteer military since 9/11, with many repeatedly returning to the battlefield. Gwen Ifill reports on how this past decade of war has led to increased stress on America's troops and their families, and how today's uniformed warriors are coping with previously unimagined challenges.