King Charles III delivered a landmark address to the US Congress, reaffirming the enduring transatlantic alliance and calling for collective defense efforts.The monarch signaled support for NATO and Ukraine while implicitly critiquing current US policies regarding climate and global security commitments.Although President Donald Trump skipped the session for protocol reasons, he engaged in private talks with the King to address ongoing diplomatic strains over international conflicts.The speech coincided with the 250th anniversary of American independence and underscored the shared democratic principles binding the two nations.