Summary
The queen and her husband Prince Philip greeted the president and U.S. first lady Michelle Obama as their helicopter touched down on the manicured lawns of Windsor Castle, the oldest and largest inhabited castle in the world located about 20 miles (32 km) to the west of the British capital.
After chatting briefly, they climbed into the queen's Range Rover where the 94-year-old Philip drove them to the royal residence, which has been a family home for British monarchs for nearly 1,000 years, as trumpets sounded in the distance.
Later on Friday, the president will meet the younger generation of royals when he has dinner with the queen's grandson Prince William and his wife Kate, and William's younger brother Harry at Kensington Palace in central London.
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