President Joe Biden and first lady Jill Biden step off Air Force One at RAF Mildenhall in Suffolk, England, Wednesday, June 9, 2021. (AP Photo/Patrick Semansky)

US President Joe Biden and First Lady Jill Biden wave as they arrive aboard Air Force One at RAF Mildenhall, England, ahead of the G7 summit in Cornwall, Wednesday June 9, 2021. Biden will attend the G7 summit in Cornwall, southwest England. (Joe Giddens/Pool via AP)

People stand atop stepladders and peer through the fence as they wait for the arrival of U.S. President Joe Biden and first lady Jill Biden in Air Force One at RAF Mildenhall, near Bury St Edmunds, in eastern England, Wednesday, June 9, 2021. Biden will attend the G7 summit in Cornwall in southwest England. (AP Photo/Matt Dunham)

Air Force One, carrying U.S. President Joe Biden and first lady Jill Biden comes into land at RAF Mildenhall, near Bury St Edmunds, in eastern England, Wednesday, June 9, 2021. Biden will attend the G7 summit in Cornwall in southwest England. (AP Photo/Matt Dunham)

President Joe Biden steps into a motorcade vehicle after arriving at RAF Mildenhall in Suffolk, England, Wednesday, June 9, 2021. (AP Photo/Patrick Semansky)

People take photos as Air Force One, carrying U.S. President Joe Biden and first lady Jill Biden arrives at RAF Mildenhall, near Bury St Edmunds, in eastern England, Wednesday, June 9, 2021. Biden will attend the G7 summit in Cornwall in southwest England. (AP Photo/Matt Dunham)