Prince Charles and the Duchess of Cornwall have met survivors of Hurricane Katrina in New Orleans.
The royal couple surveyed the damage from a levee
They visited the lower Ninth Ward, one of the areas worst hit, and climbed a levee to view the storm's destruction.
When asked by a reporter what struck him most, the prince said: "Incredible resilience, despite awful loss. Where there's life, there's hope."
The royal couple, on the fifth day of their US tour, also went to a Catholic school in the French Quarter.
The couple travelled to the lower Ninth Ward in a convoy of 17 vehicles and 14 police motorbikes.
There were many uprooted trees, damaged homes and upturned cars in the area one resident described as "New Orleans' Ground Zero".
BBC News royal correspondent Peter Hunt said: "It was a grim vista wherever they looked."
The royal couple met emergency workers and the Jones family, who lost their home in the hurricane.
The family are among people temporarily living in one of two cruise ships brought in to provide emergency accommodation.
On top of the windy levee the prince was shown photographs of the destruction immediately after Katrina struck and how the barrier was repaired by the US Army Corps of Engineers.
Red Cross worker Frances Barker told reporters at the levee: "They were really gracious people. He just said 'keep up the good work'".
At the school, Cathedral Academy, they were greeted by a crowd of around 500 people.
The couple were given traditional colourful Mardi Gras beads which they wore around their necks for the visit.
Earlier, their flight from Washington was greeted by an airport ceremony.
The royal visit is seen as helping to focus international attention on the recovery effort following Katrina, which killed around 1,200 people.
About 80% of New Orleans was left underwater after August's hurricane.
On Thursday, Prince Charles donated $25,000 (£14,000) from an architecture prize he received in Washington to help in the reconstruction of hurricane-hit towns.
The couple's US visit has included a stop at Ground Zero in Manhattan where they honoured victims of the 11 September attacks.
They will later fly to San Francisco where their tour will end.