Although America's health care system seems to have nothing but dark clouds on the horizon, some health care professions are faced with nothing but a silver lining. Topping the list is nursing, says the U.S. Department of Labor, which projects that registered nurses will outstrip all but one other profession as the fastest growing segment of the U.S. job market through the year 2020. However, many of the jobs the economy is expected to create may remain unfilled because of a lack of qualified nursing professionals.