The royal couple then inaugurated the British Memorial Garden for UK victims of the 11 September attacks. After meeting families of British victims, Prince Charles said he and his wife had been moved by what they saw.

They were met at Ground Zero by New York Governor George Pataki, British Consul General Sir Phillip Thomas and Kenneth Ringler, the executive director of the Port Authority, which owns the site. Hundreds of well-wishers met the royal couple at the British Memorial Garden where the prince unveiled a dedication stone. The pair spent some 20 minutes at the 16-acre site before meeting victims' relatives at the British Memorial Garden, a short distance away. They viewed the site and visited a room full of mementos left by families of the victims.

After meeting relatives of some of the British victims near the garden, Charles said: "Both my wife and I are profoundly moved by what we saw, not just the scale of the whole outrage but the deeply distressing individual stories of heroism and loss." "In the four years that have passed the sorrow is not lessened." "Our hearts go out to you and also to the families of the New York fire and police departments who sacrificed their lives." Talking about the memorial garden, Charles said: "Both our nations have been united by grief and strengthened by the support we have given each other." As a sign of that unity, a Union Jack recovered from the WTC site was flown alongside the World Trade Center flag for the visit. Prince Charles added: "Sixty seven Britons died, the largest single group of foreign nationals. It is fitting their lives will be commemorated in the heart of Manhattan."

At nearby Hanover Square, the couple unveiled the cornerstone to the memorial garden. They walked around to greet some of the several hundred well-wishers and onlookers who gathered behind barricades at the square, named for King George I of Hanover. The garden, due to be completed next summer, is designed as a green corner of Britain in Manhattan, with topiary trees, boxwood hedges and a sculpture by artist Anish Kapoor. Camilla laid a bouquet of flowers at the memorial overlooking Ground Zero,  which is dedicated to the 67 Britons killed in the September 11 terrorist attacks, along with a card, hand-written by the Prince, reading: "In enduring memory of our shared grief", signed by both of them.