John Kerry hailed the contribution of outgoing Secretary of State Hillary Clinton at his official swearing in ceremony in Washington.
"I want to thank Secretary Clinton for the unbelievably high standard of energy, commitment and vision that she set in her superb stewardship of the US State Department," said Kerry.
The new Secretary of State also paid tribute to Barack Obama, saying: "The President has restored American's place and our reputation in the world."
More top news
A new set of stamps is being issued to commemorate the 70th wedding anniversary of the Queen and Duke of Edinburgh.
MPs describe their report into the food safety concerns we highlighted at 2 Sisters as a 'wake up call' for the regulator.
Close to a frost in places tonight