Charles III today delivered the speech the British crown had dreamed about for decades: before a joint session of the US Congress. The second British monarch in history to address American lawmakers, after his mother Elizabeth II in 1991. A parallel he himself drew, with tears in his eyes.

"I address this Joint Session and speak on behalf of the Queen and myself," were his first words. Then came the moment that the whole room noticed: "It is difficult not to feel the weight of history on my shoulders."

The king did not avoid current topics. He referred directly to the 2021 attack on the Capitol: "Violence will never succeed, no matter our differences." In a country where half the citizens still claim their elections were stolen, that was not a diplomatic guarantee - it was a message.

He spoke about Elizabeth in a voice that broke: "I cannot help but think of my late mother, Queen Elizabeth, who in 1991 also had this great honour." A scene in which a 76-year-old king becomes a son paying respects to his mother. The cameras did not miss a single frame.

Charles listed his ties to America - this is his twentieth visit to the US, his first as king. He also mentioned King George VI, his grandfather, as the first British monarch to visit America in 1939.

But behind the moving tones there was also a warning. "We find ourselves in a new era, more changeable and more dangerous," Charles said. The challenges are "too large for any single nation to carry alone". A reminder to his hosts that the alliance is neither automatic nor eternal: "Our alliance cannot rely on past achievements, or assume that the basic principles will simply survive."

In Balkan kafanas, speeches like this are read carefully. When a 76-year-old monarch tells that to Donald Trump's America, something has to be read between the lines. Does London still believe Washington is the old ally - or is it just pretending to, while looking for alternatives under the table?