Sgt. Derrick Junge was diagnosed with a concussion, but passed over for a Purple Heart. Junge has not received rehabilitation or treatment for ongoing medical difficulties, and he struggles with simple tasks. NPR/Frontline hide caption

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Sgt. Victor Medina suffered brain damage when an IED hit his truck in Iraq. Even after he was diagnosed with a traumatic brain injury, he found he had to fight to get adequate care. Blake Gordon/Aurora Photos hide caption

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Michelle Dyarman, a former major in the Army reserves, was involved in two roadside bomb attacks and a Humvee accident in Iraq in 2005 that left her with serious cognitive problems. David Gilkey/NPR hide caption

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