William and Kate visit 9/11 memorial in New York
The Duke and Duchess of Cambridge have visited the New York memorial dedicated to those who died on 9/11.
Prince William and Catherine travelled to the site where the former World Trade Center stood on the final day of their visit to the United States.
Nearly 3,000 people, including 67 Britons, died in the terrorist attacks in 2001.
On Monday, Prince William held talks with US President Barack Obama before the royals attended a basketball match.
At the 9/11 memorial, the couple left a bouquet of white roses - the state flower of New York - to remember those who died.
A handwritten note left with the flowers read: ""In sorrowful memory of those who died on 11th September, and in admiration of the courage shown to rebuild."
The memorial features two large waterfalls and reflecting pools, set within the footprints of the original Twin Towers.
Catherine later said she felt affected by being able to touch the names of the victims, inscribed around the edges of the pools.
'Care and curiosity'
The duke and duchess were also given a tour of the museum at the memorial.
Allison Blais, the museum's chief of staff, said: "She [Catherine] talked about how in awe she was of the enormity of the space. It was something she did not anticipate."
Joe Daniels, the museum's chief executive and president, said: "You could see it really in both their eyes, the sort of care and curiosity they had for the story of what happened and the people who died that day."
Later, Prince William offered a helping hand to a playwright and actor who impressed him with a performance at a youth organisation that works with disadvantaged children in New York.
The prince praised Steven Prescod, 22, after watching his show, saying it had been "amazing" and adding: "Please get in touch."
The prince even offered to help the performer put his show on at venues in the US and the UK, telling him and the other performers: "We should get you on in the West End.
"All I can say is, it was really impressive. It nearly had me in tears."
The final engagement of the visit was a University of St Andrews 600th anniversary dinner at the Metropolitan Museum of Art.
On Monday evening, the royal couple attended a basketball match between the Brooklyn Nets and the Cleveland Cavaliers where they met singer Beyonce and her husband Jay-Z.
The duke and duchess were also given special Cleveland Cavaliers strips, including one for Prince George, by NBA star LeBron James.
Earlier on Monday, Prince William met President Obama at the White House, where they held talks in the Oval Office.
The prince also delivered a speech to the World Bank on wildlife crime, in which he described the illegal wildlife trade as "one of the most insidious forms of corruption and criminality in the world today".