Their Royal Highnesses meet guests at a reception hosted at the British Embassy in WashingtonView Album (10 images)
The Prince of Wales and The Duchess of Cornwall arrived in Washington yesterday evening for a four-day trip that will help strengthen the close ties between the two countries.
Their Royal Highnesses are making their third joint official visit to America and will spend much of their time in the capital Washington highlighting a range of issues and celebrating historic milestones.
America's President Barack Obama will sit down for informal talks with The Prince and Duchess in his famous Oval office tomorrow and will be joined by his vice president Joe Biden.
The Prince last met the president in May 2011, a few days after the Royal wedding of The Duke and Duchess of Cambridge when the world leader confessed the glittering occasion had left America mesmerised.
Sir Peter Westmacott said before The Prince's plane touched down: "I am so pleased to welcome The Prince of Wales and The Duchess of Cornwall back to the United States, ten years after their first official visit together.
"Their trip to Washington and Kentucky will showcase the best of the transatlantic relationship - promoting democratic values, combating climate change, preserving the natural environment, creating opportunities for the next generation - and provide yet another reminder of the essential role the Royal Family play in keeping that relationship special."
Highlights of the trip include a tour of Mount Vernon - home of America's first president George Washington - and Charles will receive an award for exceptional leadership in conservation from the International Conservation Caucus Foundation.
The visit will see the royal couple mark major milestones, from the 150th anniversary of the end of the American civil war and death of president Abraham Lincoln, to the 800th anniversary of the Magna Carta.
The Prince and Duchess will also visit the home city of renowned boxer Muhammad Ali.
Ali was born in Louisville, Kentucky and Their Royal Highnesses will tour the city which features a cultural centre dedicated to the life and achievements of the three-time former heavyweight boxing champion.
Today The Prince will mark the 800th anniversary of Magna Carta during a visit to the National Archives where he will view the "Charters of Freedom" and the 1297 version of the Magna Carta, which is embodied in the American Bill of Rights and the Constitution.
He will also give a speech to representatives of major companies, leading environmental organisations and government - including Global Ocean Commission co-chairman David Miliband - gathered together to look at the issue of plastic waste in seas and oceans.
Meanwhile The Duchess will visit the Shakespeare Theatre Company where she will tour the theatre, meet staff and children who use the theatre and then view a short production by the company's Text Alive programme.
Their Royal Highnesses attend a reception hosted by Sir Peter Westmacott at the British Embassy in WashingtonView Album (10 images)