Joe Biden arrived in the UK on Air Force One ahead of the G7 summit in Cornwall.
He landed at RAF Mildenhall in Suffolk on Wednesday evening, beginning his first overseas trip as US President.
A large crowd of US Air Force members and their families was waiting for him in a hangar, where he is to speak to them.
He is expected to spend around 90 minutes in Mildenhall before flying to Newquay and then to Tregenna Castle in Carbis Bay.
He will meet Prime Minister Boris Johnson tomorrow before the start of the G7 at Carbis Bay on Friday.
After the summit – which also includes leaders from Canada, Japan, France, Germany and Italy – Mr Biden and the first lady will meet with the Queen at Windsor Castle before the President visits Belgium and then in Swiss.
Mr Johnson has said he wants to discuss the COVID-19 pandemic and urge other leaders to do more to vaccinate the rest of the world, but it is likely that the growing trade line of Brexit and its effects on the process of peace in Northern Ireland will also arise.
Mr Biden’s national security adviser Jake Sullivan has warned the president has “very deep” concerns over the issue, adding that the post-Brexit protocol in Northern Ireland is “critical” to ensuring the protection of the Good Friday agreement.
During Mr. Biden’s flight across the Atlantic, his press secretary Jen Psaki and Mr. Sullivan told reporters what else was on Mr. Biden’s agenda:
• Increase in vaccine supply – the United States announced Wednesday evening that it donate 500 million COVID-19 vaccines to the poorest countries
• Following discussions on possible exemptions from intellectual property laws allowing the production of more vaccines globally, Sullivan said he does not anticipate conflict but “convergence” on the issue.
• Mr Sullivan said moves to vaccinate poorer countries faster is “the right thing to do” and the smart thing to do in terms of stopping new variants of the virus. Mr Biden also wants to show that democracies can lead the fight
• Mr. Biden will meet Russian President Vladimir Putin in Switzerland where he will discuss the increase in ransomware attacks attributed to Russian hackers
• The conflict in Syria will be discussed, as will concerns about Russia’s new nuclear systems.
• Mr Biden and Mr Johnson should update the decades-old Transatlantic Charter
Mr. Biden and his wife Jill will spend eight days in Europe, a trip, he said previously, intended to show America’s “renewed commitment to our allies and partners.”