Humana's McCallister on Health-Care Ruling, Costs

June 28 (Bloomberg) -- Michael McCallister, chief executive officer of Humana Inc., talks about the Supreme Court's decision to uphold the core of President Barack Obama’s health-care overhaul and the potential impact on the health-care industry and Humana. He speaks with Adam Johnson and Trish Regan on Bloomberg Television’s “Street Smart.” (Source: Bloomberg)