A diplomatic error occurred during King Charles III and Queen Camilla's visit to Arlington National Cemetery in Arlington, Virginia, when the British Union Jack was flown upside down. The royal couple laid a wreath at the Tomb of the Unknown Soldier to honor fallen soldiers and commemorate the military alliance between the United States and the United Kingdom. According to the Flag Institute, the Union Jack must be displayed with the wider diagonal stripe representing Scotland above the red diagonal stripe representing Ireland. The upside-down display was deemed improper and drew significant media attention. This incident followed another flag mishap earlier in the visit, where Australian and American flags were mistakenly displayed together on light posts in Washington, D.C. The Department of Transportation is investigating how these errors occurred, emphasizing the importance of maintaining proper flag protocols during official events.