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Our veterans at risk? Scan detects signs of brain injury that afflicts NFL players
(CNN) -- After his last tour in Iraq, it took master gunner Shane Garcie about six weeks to notice he'd changed. "Your brain is throwing parties because you're home, you're alive," says Garcie. "So, it doesn't settle in right away." Now he's not sure what bothers him most: the fogginess of his brain, the anger that can erupt from nowhere or the deep, dark depressions he can't shake off.