U.S. presidents often find themselves under severe physical and mental strains -- whether these stem from an assassination attempt, the common cold or a major surgery, like the 1965 operation Lyndon Johnson (left) underwent to remove his gallbladder. An elite team of White House physicians works around the clock -- and around the world -- to address everyday health concerns and emergency situations facing, arguably, the nation's most powerful and important patient. Full story »
From secretive jaw surgery to gunshot wounds to perilous pretzels, American presidents have coped with a wide variety of medical issues -- some of them fatal. Timeline »
Dr. E. Connie Mariano spent parts of ten years treating the nation's commander in chief. A physician under George H.W. Bush, Bill Clinton and George W. Bush, Mariano talked with CNN's Dr. Sanjay Gupta about the challenges of working in the White House.
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