As the worsening economy leads to massive job losses -- potentially increasing the ranks of the tens of millions of Americans without health insurance -- FRONTLINE travels the country examining the nation's broken health care system and exploring the need for a fundamental overhaul. The scale of the problem now facing the Obama administration, FRONTLINE finds, is staggering, as lay-offs, major illness, and other unexpected life changes leave more and more Americans uninsured, underinsured or uninsurable. FRONTLINE also goes inside insurance companies to question executives on their policies, programs and priorities and examines the problems in one state's attempts at health care reform.