There were plenty of blunders while Donald Trump was president - and he has continued to have a dramatic life after leaving the White House.
In one awkward moment, the then-President appeared to break with protocol during the state banquet as he placed his hand on the late Queen's back.
Joe Biden was under scrutiny today not to accidentally walk into a blunder when he met King Charles and Rishi Sunak on a whistleblow tour.
Previously Trump raised eyebrows as he delivered his speech to the 170 guests in the ballroom before gesturing towards the Monarch and touched her while she stood to his toast.
Happily, the late Queen seemed unfazed by the action as she toasted his words.
In the opulent Buckingham Palace ballroom, the then-US president, First Lady Melania Trump and four of Mr Trump’s five children were part of the 170 strong guest list treated to steamed fillet of halibut with watercress mousse, asparagus spears and chervil sauce.
It was followed by saddle of new season Windsor lamb, with herb stuffing, spring vegetables and port sauce.
The exclusive array of guests dined on a menu of Windsor lamb and strawberry sable. The state banquet takes place on the first night of a state visit.
The guests include members of the government, diplomatic coprs and other important figures connected with the visiting nation.
Meanwhile, today, the King and the US President Joe Biden were praised for using their convening power to bring together wealthy business figures and philanthropists who have pledged to invest billions of dollars in climate finance.
The two men were welcomed into the Green Drawing Room at Windsor Castle by Grant Shapps, the energy secretary, who alongside John Kerry, US Special Presidential Envoy for Climate, had earlier hosted a green investment forum.
Mr Shapps thanked both Charles, 74, and Mr Biden, 80, for bringing together those gathered in the room to discuss how to “better serve the world” through investment in green technology.
The Climate Finance Mobilisation Forum, which met on Monday morning elsewhere in Windsor, aims to release private climate investment for emerging economies, an issue about which the King is passionate.
Participants included representatives from BlackRock, HSBC and Bank of America, as well as philanthropies such as the Sea Change Foundation.
As participants gathered together to brief the King and Mr Biden on their discussions, Mr Shapps said: “Your Majesty, Mr. President, welcome.
“I want to start by saying a big thank you to the both of you for allowing us here” to discuss unlocking climate finance, adding: “We are appreciative of your convening power in having us do this.”
Mr Shapps praised the King for being "inspirational" in warning the world about the fundamental problem of climate change over “many decades”, noting that it was only more recently that action was taken.
