Princess Elizabeth and Duke of Edinburgh on US trip in 1951

The transcript describes the visit of the Prince and Princess to the United States, where they are warmly welcomed by President Truman and his family. Their Canadian tour culminates with an invitation to stay at Blair House in Washington. The schedule is busy, and after being greeted by a large crowd, the Princess attends a press conference to express gratitude for the warm reception in America.

What kind of welcome did the visitors receive in Washington?

What did the Princess do after being hailed by half a million people?