A soldier who lost all his limbs after an explosion in Afghanistan and created a retreat to help others like him understands that injuries can run deeper than shattered bones. So, the Travis Mills Foundation plans to address post-traumatic stress disorder when it embarks on a major expansion of its facility in Rome. For one week each month, the retreat that opened two years ago will dedicate itself to PTSD recovery by getting participants started in a series called Warrior’s PATHH, operated by a partner.