On the second day of a four-day state visit, Charles is expected to call in his speech for "reconciliation and renewal," with the so-called special relationship between Washington and London under strain

Much of the day will be given over to pomp and ceremony, with King Charles and Queen Camilla receiving a traditional arrival ceremony that's expected to feature a 21-gun salute and an inspection of troops

The US leader and First Lady Melania Trump will then host the royals in the Oval Office behind closed doors. In the evening they will return to the White House for a grand state dinner

On Day 1, the royals attended a garden party at the British embassy, with cucumber sandwiches and scones on the menu

The second day will feature perhaps the most public-facing moment, when Charles becomes the first British monarch to address Congress since his mother, queen Elizabeth, in 1991.