April 29 (UPI) — Britain’s King Charles II and Queen Camilla will visit the 9/11 memorial and meet with victims’ families and first responders in New York City on the third day of their state visit to the United States.

It will be the first visit by a reigning British monarch since Queen Elizabeth II visited in 2010.

The terrorist attacks at the World Trade Center in 2001 killed nearly 2,800 people, 67 of them British. During the queen’s trip, she officially opened what is now called the Queen Elizabeth II September 11th Garden. The lower Manhattan space honors the British citizens who died in the attacks.

Charles spoke to both houses of Congress on Tuesday, and he mentioned that 9/11 was the first time that NATO invoked Article 5, which declares that an attack on any members is an attack on all. Trump has repeatedly claimed that NATO has never come to the aid of the United States.

Charles also emphasized his country’s involvement in the war in Afghanistan. Trump said earlier this year that British troops “held back” in the war, which caused some Brits to demand the state visit be canceled.

Charles is also planning a trip to Harlem Wednesday to visit an urban farm project for kids. Camilla is set to attend an event celebrating the United States’ and Britain’s love for literature.

Charles will then go to a trade and business event and a reception and then head back to Washington, D.C.

The pair will attend a block party for the United States’ 250th anniversary in Virginia Thursday and say good-bye to Trump, ending their state visit.