The U.K. is hosting the G7 summit that starts in Cornwall on Friday, and the White House has said that the fact that Biden is meeting with Johnson first shows the special significance of the U.S.-U.K. relationship.

But despite what's long been called a \"special relationship\" between the two countries, the leaders have their differences. For one, Biden did not support Brexit, while Johnson led the movement to break from the European Union. The White House has also made clear Biden wants no changes in the Good Friday agreement on Northern Ireland.

Administration officials said Thursday that the key priorities of the meeting will be on \"the pressing set of global challenges\": COVID-19, climate change, counter-terrorism, Afghanistan troop withdraw, Indo-Pacific challenges, Russia and the Middle East.

\"PHOTO:
Wpa Pool/Getty Images
PHOTO: Britain's Prime Minister Boris Johnson meets with U.S. President Joe Biden, ahead of the G7 summit, at Carbis Bay Hotel, on June 10, 2021 near S.t Ives, England.
>

\"There's the security dimension, with an unparalleled defense and security alliance promoting stability worldwide,\" an administration official told reporters Thursday. \"There's an economic dimension, the robust economic partnership between our countries, sees the UK as our largest investment partner, and the fourth largest trading partner for the United States. And of course, the relationship is also about democratic values,\" the official said.

Biden and Johnson also recommitted a new Atlantic Charter, 80 years after President Franklin Roosevelt and Prime Minister Winston Churchill signed the original agreement in 1941, which the two leaders viewed together and heard about its history ahead of their bilateral meeting, which ran 90 minutes. The charter has been updated to address cyberthreats, health crises, and other modern challenges.

\"PHOTO:
Toby Melville/Reuters
PHOTO: Britain's Prime Minister Boris Johnson speaks with U.S. President Joe Biden while they walk outside Carbis Bay Hotel, Carbis Bay, Cornwall, Britain, June 10, 2021.
>

\"It's about time that the original gets refreshed,\" an administration official said. \"The original really outlined what the post-World War world order could and should look like. This new charter will make clear what the coming decades of the 21st century can and should look like from the perspective of common values and common aspirations for people everywhere.\"

The U.S. and the U.K. will also be releasing a joint statement later Thursday announcing new initiatives committing to work together in the areas of science, technology, energy and health. Among them, there will be a launch of a working group to reopen travel between the U.S. and the U.K. and a commitment to hold a cancer summit.

\"PHOTO:
Joe Giddens/Pool via AP
PHOTO: President Joe Biden and First Lady Jill Biden arrive aboard Air Force One at RAF Mildenhall, England, June 9, 2021.
>

Later in the day, Biden is slated to announce 500 million doses of COVID-19 vaccine to distribute around the world, announced as he began a series of high-profile summits in Europe. The goal, according to national security adviser Jake Sullivan, is to make the U.S. \"the arsenal of vaccines,\" like the nation was \"the arsenal of democracy during World War II.\"

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