Camilla, Duchess of Cornwall, and Prince Charles, Prince of Wales, arrive at the Kentucky Center for African American Heritage in Louisville on Friday, March 20, the fourth day of a visit to the United States.
Camilla, Duchess of Cornwall, and Prince Charles, Prince of Wales, arrive at the Kentucky Center for African American Heritage in Louisville on Friday, March 20, the fourth day of a visit to the United States.
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The duchess speaks with a group of children while visiting Neighborhood House, a community outreach center in Louisville's West End neighborhood, on March 20.
The duchess speaks with a group of children while visiting Neighborhood House, a community outreach center in Louisville's West End neighborhood, on March 20.
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The duchess during a visit to Churchill Downs in Louisville, Kentucky, on March 20.
The duchess during a visit to Churchill Downs in Louisville, Kentucky, on March 20.
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The royal couple talk to veterans during a visit to an armed forces retirement home in Washington, D.C. on Thursday, March 19.
The royal couple talk to veterans during a visit to an armed forces retirement home in Washington, D.C. on Thursday, March 19.
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Britain's Prince Charles and his wife, Duchess Camilla, visit President Barack Obama and Vice President Joe Biden in the White House Oval Office on March 19.
Britain's Prince Charles and his wife, Duchess Camilla, visit President Barack Obama and Vice President Joe Biden in the White House Oval Office on March 19.
BRENDAN SMIALOWSKI/AFP/Getty Images
Camilla talks to Michael Kahn, artistic director of the Shakespeare Theatre Company in Washington, on March 19.
Camilla talks to Michael Kahn, artistic director of the Shakespeare Theatre Company in Washington, on March 19.
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Charles and Camilla are led on a tour of President Lincoln's Cottage in Washington on March 19.
Charles and Camilla are led on a tour of President Lincoln's Cottage in Washington on March 19.
Evan Vucci/AP
Charles and Camilla arrive at the White House on March 19.
Charles and Camilla arrive at the White House on March 19.
Susan Walsh/AP
The royal couple greet residents and staff as they tour the Armed Forces Retirement Home on March 19.
The royal couple greet residents and staff as they tour the Armed Forces Retirement Home on March 19.
Andrew Harnik/AP
Charles and Camilla walk down a colonnade during a visit to Mount Vernon, Virginia, on Wednesday, March 18. Mount Vernon was the home of President George Washington.
Charles and Camilla walk down a colonnade during a visit to Mount Vernon, Virginia, on Wednesday, March 18. Mount Vernon was the home of President George Washington.
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Charles looks at the Declaration of Independence during a visit to the National Archives in Washington on March 18.
Charles looks at the Declaration of Independence during a visit to the National Archives in Washington on March 18.
Evan Vucci/AP
The royal couple visit the Lincoln Memorial in Washington on March 18.
The royal couple visit the Lincoln Memorial in Washington on March 18.
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Charles, third from left, and Camilla, wearing the hat, tour the Martin Luther King Jr. Memorial in Washington on March 18. Among those accompanying the royal couple are the Rev. Jesse Jackson, second from left; U.S. Rep, Terri Sewell, second from right; and chief architect Ed Jackson, far right.
Charles, third from left, and Camilla, wearing the hat, tour the Martin Luther King Jr. Memorial in Washington on March 18. Among those accompanying the royal couple are the Rev. Jesse Jackson, second from left; U.S. Rep, Terri Sewell, second from right; and chief architect Ed Jackson, far right.
Andrew Harnik/AP
Charles greets guests at a reception at the British ambassador's residence in Washington on Tuesday, March 17.
Charles greets guests at a reception at the British ambassador's residence in Washington on Tuesday, March 17.
Andrew Harnik/AP
The royal couple is accompanied by Peter Westmacott, British ambassador to the United States, as they arrive at his residence on March 17.
The royal couple is accompanied by Peter Westmacott, British ambassador to the United States, as they arrive at his residence on March 17.
Andrew Harnik/AP
Camilla speaks with guests at the reception on March 17.
Camilla speaks with guests at the reception on March 17.
Andrew Harnik/AP
Charles and Camilla arrive at Andrews Air Force Base in Maryland on March 17. <a href="index.php?page=&url=http%3A%2F%2Fwww.cnn.com%2F2015%2F03%2F13%2Fworld%2Fgallery%2Fprince-charles-camilla%2Findex.html" target="_blank">See more photos of the couple through the years</a>
Charles and Camilla arrive at Andrews Air Force Base in Maryland on March 17. See more photos of the couple through the years
Nicholas Kamm,/Pool/AP