Lead poisoning, once epidemic among Baltimore’s poor, is now much now less common, but it is still claiming young victims years after authorities vowed to eradicate it. At least 4,900 Maryland children have been poisoned by lead in the past decade, their brains exposed to a toxic contaminant that often causes lasting learning and behavioral problems. (Baltimore Sun video) (Christopher T. Assaf, Karl Merton Ferron, Lloyd Fox, Algerina Perna/Baltimore Sun)