A Medal of Honor recipient who lost part of his right arm in a firefight in Afghanistan says society doesn’t fully understand the mental injury that today’s veterans suffer. Speaking Friday at the Warrior Resilience Conference in Washington, D.C., Army Sgt. 1st Class Leroy Petry said service members with internal injuries and psychological damage suffer the most, not necessarily those with external wounds. Troops with visible injuries receive accolades, but those with unseen wounds are ignored, Sgt. Petry said, adding that whenever someone thanks him for his sacrifice, he makes sure those near him who have served also are thanked....