The two boys both have Duchenne Muscular Dystrophy, a genetic disorder that typically has children wheelchair bound by the age of 12. Average life expectancy is less than 30. But there is a gene therapy that may slow or even halt the progress of the disease. Insurance approved one brother for the treatment, but then when the other applied for coverage a little while later, he was denied. NBC News’ Maggie Vespa reports for the series “The Cost of Denial.” | NBC Nightly News with Tom Llamas