President Joe Biden departs for his first foreign trip as president at Joint Base Andrews in Maryland after speaking with reporters, June 9, 2021. Biden is traveling to Europe for scheduled meetings with leaders from NATO, the European Union and the Group of Seven. Queen Elizabeth II will also host Biden at Windsor Castle, and he will meet with Russian President Vladmir Putin in Geneva.
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People stand atop stepladders behind a fence as they wait for the arrival of President Joe Biden and first lady Jill Biden at RAF Mildenhall in eastern England, June 9, 2021.
President Joe Biden made his first stop to visit with American service members, making remarks to U.S. Air Force personnel and their families stationed at RAF Mildenhall in England, June 9, 2021. Biden reaffirmed U.S. support for NATO, saying, "The United States is back."
Air Force One lands in the fog as military personnel stand to welcome President Joe Biden and first lady Jill Biden at Cornwall Airport Newquay in England, ahead of the G-7 summit in Cornwall, June 9, 2021.
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Britain's Prime Minister Boris Johnson and his wife, Carrie Johnson, visit with President Joe Biden and first lady Jill Biden outside the Carbis Bay Hotel, June 10, 2021 in St Ives, England. The two met ahead of the G-7 summit and agreed to a new version of the 1941 Atlantic Charter originally signed by Franklin D. Roosevelt and Winston Churchill.
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President Joe Biden acknowledges Pfizer CEO Albert Bourla, right, as he speaks about his administration's global COVID-19 vaccination efforts ahead of the G-7 summit, June 10, 2021, in St Ives, England. Biden announced the U.S. would purchase half a billion doses of the Pfizer vaccine to share with nearly 100 low-income countries.
First lady Jill Biden and Britain's Catherine, Duchess of Cambridge, talk with children during a visit to Connor Downs Academy, in Hayle, Cornwall, Britain, June 11, 2021.
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President Joe Biden and British Prime Minister Boris Johnson gesture as they pose for a family photo with G-7 leaders; European Council President Charles Michel, Japan's Prime Minister Yoshihide Suga, Italy's Prime Minister Mario Draghi and French President Emmanuel Macron at the G-7 summit, in Cornwall, Britain, June 11, 2021.
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President Joe Biden walks with France's President Emmanuel Macron at G7 summit in Carbis Bay, Cornwall, Britain, June 11, 2021.
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A handout photo made available by the British government shows Queen Elizabeth II sharing a light moment with President Joe Biden and first lady Jill Biden during a dinner reception at the G7 summit in Cornwall, England, June 11, 2021.
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President Joe Biden gestures next to Britain's Prime Minister Boris Johnson (at right) during the G7 summit in Cornwall, England, June 12, 2021.
President Joe Biden speaks during a news conference after attending the G-7 summit, June 13, 2021, at Cornwall Airport in Newquay, England.
Queen Elizabeth stands and President Joe Biden in front of members of the Royal Guard at Windsor Castle near London, June 13, 2021.
President Joe Biden inspects the Guard of Honour formed of The Queen's Company First Battalion Grenadier Guards at Windsor Castle near London, June 13, 2021.
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Belgium's Prime Minister Alexander De Croo welcomes President Joe Biden, as he arrives ahead of a NATO summit, at Brussels Military Airport in Melsbroek, Belgium June 13, 2021.
President Joe Biden and Turkey's Recep Tayyip Erdogan fist bump during a plenary session of a NATO summit at the North Atlantic Treaty Organization (NATO) headquarters in Brussels, June 14, 2021. The two leaders later held a one-on-one meeting amid strained relations between the two countries.
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President Joe Biden and NATO Secretary General Jens Stoltenberg, right, talk after a summit, June 14, 2021, at NATO Headquarters in Brussels. Biden reaffirmed U.S. support the alliance and NATO's Article 5 -- which states an attack on one member nation is an attack on all, saying that it was "a sacred obligation."
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President Joe Biden visits a memorial to the 9/11 terrorist attacks, following his news conference at NATO headquarters in Brussels, June 14, 2021. The memorial features a piece of steel from the North Tower of the World Trade Center that was destroyed in the attacks.
Doug Mills/The New York Times via Redux
President Joe Biden attends the United States-European Union Summit with Secretary of State Antony Blinken, back left, and Commerce Secretary Gina Raimondo, right, at the European Council in Brussels, June 15, 2021. Biden announced the United States and European Union had reached a deal to end a 17-year dispute over airline subsidies.
President Joe Biden and Russia's President Vladimir Putin shake hands as they arrive for the U.S.-Russia summit at Villa La Grange in Geneva, Switzerland, June 16, 2021.