As UNH CEO Steven Hemsley faces multiple challenges in his efforts to turn around the nation's largest health insurer. Let's get to Bertha Kums this morning at HQ for more. Morning Bertha. >> Morning Carl.You know during his first 10ear stint as CEO of United Health, Steven Hemsley was all about building the company's Optimum Services division into a healthcare juggernaut through acquisitions which saw profits grow more than 200%. Now his focus is a major rehabilitation of United Health struggling Medicare ...