A Cowboys’ fan records Herschel Walker, Heisman Trophy recipient and mental health advocate, speech about mental health at Langley Air Force Base, Va., Sept. 17, 2014. Walker shared his main piece of advice to military members who may be battling mental health disorders, such as post-traumatic stress disorder or depression - “There is no shame for asking for help, I did.” (U.S. Air Force photo by Airman 1st Class Breonna Veal/Released)(The photo was cropped and color corrected to emphasize subject)