US Secretary of State Hillary Clinton has said she will step down as America's top diplomat and enjoy some rest despite the re-election of Barack Obama as US president. Though many see this as the end of her political career, her diplomatic legacy will continue to exert influence across the world.

Since becoming the secretary of state in 2009, Clinton has made 70 overseas trips to more than 100 countries, spent 340 days on the road, including more than 80 days on her Air Force 757, and has been praised by the American media as a diplomatic "labor model".

Clinton has brought great strategic thinking to her job. Despite a mountain of domestic economic problems created by the global financial crisis, solving the diplomatic problems left behind by former US president George W. Bush was once high on her diplomatic agenda. According to American media reports, Clinton has worked into the small hours in her office trying to find ways to retain the US' global leadership and rebuild its credibility, and to deal with various global challenges in the post-Cold War era.