The Duke and Duchess of Cambridge laid a bouquet of flowers at the 9/11 memorial today during their visit to New York.
Kate lovingly placed the flowers down and made the sure the bow was tied around them.
The card read: "In sorrowful memory of those who died on September 11th and in admiration of the courage shown to rebuild."
Later the royal couple are due to visit the Empire State Building before hosting a ball.
It is expected to be a celebrity-studded event at the Metropolitan Museum of Art, better known as The Met.
William and Kate Duke and Duchess take courtside seats at NBA game in New York Beyonce Jay Z LeBron JamesRead the full story ›
The Duke and Duchess of Cambridge met LeBron James, aka the "King of Cleveland," after the NBA game in New York, when the basketball star posed for pictures with the royal couple.
William and Kate were presented with two Cavaliers basketball vests - one bearing the name "Cambridge" and the other a junior version for their young son, with "George" printed on the back.
The Duke and Duchess met music's golden couple Jay Z and Beyonce at the NBA game in New York tonight.
Earlier the royals were broadcast on the big screen, to cheers from the crowd.
The Duke and Duchess of Cambridge Kate and William are attending an NBA game in New York tonight, following the Prince's speech at a wildlife reception.
The couple posed for pictures with NBA legend Dikembe Mutombo and William tried to get to grips with a new basketball trick.
Prince William told guests at a wildlife reception in New York that Western nations could look "closer to home" to remedy the problem of the illegal trade in exotic animal products.
The 32-year-old royal said "iconic species are being "illegally butchered in the name of trinkets and medicine".
Prince William drew laughter from the crowds at a wildlife reception in New York tonight when he ended his speech telling the guests, "I'm off to shoot some hoops now or whatever it is you do."
The Duke and Duchess of Cambridge met Hillary Clinton and her daughter Chelsea at a reception at the British Consul General’s Residence in New York tonight.
The event, in honour of wildlife conservation charity Tusk Trust, is co-hosted by the Clinton Foundation, which works to tackle elephant poaching and the illegal ivory trade.
A young boy the Duchess of Cambridge visited at a children's centre in Harlem said: "The Princess is beautiful".
Earlier Kate had helped him make Christmas decorations at the Northside Center in Harlem.
When asked about her afterwards, he appeared coy as he revealed his crush on the Princess.
ITV News Correspondent Paul Davies has this report:
China will want to know what Prince William will say when he visits China after he spoke out against the illegal wildlife trade, an expert told ITV News.
The country is the world's biggest destination for illegal ivory fulled by the belief it is an aspirational possession and a remedy in Chinese medicine.
ITV's China Correspondent Lucy Watson has this report: