King Charles III is set to address a joint meeting of Congress on Tuesday afternoon, marking his first official visit to the United States since ascending to the throne.

The speech comes as part of events commemorating the 250th anniversary of American independence from Great Britain and is expected to highlight the enduring alliance between the two nations.

The visit also takes place amid heightened security concerns in Washington following a recent shooting incident near the White House Correspondents’ Association Dinner, which prompted increased scrutiny over the protection of public officials and dignitaries.

In an invitation issued earlier this month, House Speaker Mike Johnson and other congressional leaders said the address would offer an opportunity for the king to outline his vision for the future of U.S.-U.K. relations and reaffirm the longstanding partnership between the two countries.

Johnson described the visit as significant, saying the king would be “welcomed with open arms” and would help underscore the importance of the transatlantic relationship at a pivotal moment.