Which former advertising personality has recently been named the Undersecretary of State for 'public diplomacy and public affairs' of the US in an exercise to rebrand the US following the September 11 terrorist strikes?

Charlotte Beers, a former advertising executive and chairperson of Ogilvy & Mather Worldwide, was appointed Undersecretary of State for Public Diplomacy and Public Affairs in 2001. She was tasked with improving America's image abroad following the September 11 attacks. Her background in advertising and branding was seen as valuable for the US government's public diplomacy efforts.