Sgt. Mark Miranda, a public affairs specialist at Joint Base Lewis-McChord in Washington state, demonstrates the use of a program in July 2011 that was designed to help calm symptoms of post-traumatic stress and traumatic brain injury. A new class of apps is offering more sophisticated mental health help to struggling teens, including emergency, 24/7 connection to counselors. Ted S. Warren/AP hide caption

itoggle caption Ted S. Warren/AP

Jonathan Noyes started binging on food after a stressful period in his family's life, including his father's job loss and his grandmother's cancer. Maggie Starbard /NPR hide caption

itoggle caption Maggie Starbard /NPR