The U.S. healthcare system is a $3.2 trillion industry, and Amazon.com Inc. is positioning itself to take a share of it. In this segment, Internet Health Management editor Mark Brohan explains how e-retailing's leader is getting into the healthcare space more significantly--Amazon's AWS unit powers Healthcare.gov, for instance--and the waves it is creating for other healthcare players. Internet Health Management is Digital Commerce 360's news site that explores how the internet and e-commerce technology are changing how consumers research, pay for and manage healthcare.