Crown Prince Frederik and Crown Princess Mary of Denmark went to the reception of the 50th anniversary of the Danish Embassy in Washington, Friday, June 4, 2010 Photo: Albert Nieboer

Crown Prince Frederik and Crown Princess Mary of Denmark went to the reception of the 50th anniversary of the Danish Embassy in Washington, Friday, June 4, 2010 Photo: Albert Nieboer

Crown Prince Frederik and Crown Princess Mary of Denmark went to the reception of the 50th anniversary of the Danish Embassy in Washington, Friday, June 4, 2010 Photo: Albert Nieboer

Crown Prince Frederik and Crown Princess Mary of Denmark went to the reception of the 50th anniversary of the Danish Embassy in Washington, Friday, June 4, 2010 Photo: Albert Nieboer

Crown Prince Frederik and Crown Princess Mary of Denmark visit soldiers recovering from combat wounds a they receive physical therapy at the Walter Reed Army Medical Center in Washington, Friday, June 4, 2010. At right is Staff Sgt. Shane Baldwin from Hope, Ark., who was severely wounded by an IED in Afghanistan. Pool (AP Photo/J. Scott Applewhite)

Crown Prince Frederik and Crown Princess Mary of Denmark visit soldiers recovering from combat wounds a they receive physical therapy at the Walter Reed Army Medical Center in Washington, Friday, June 4, 2010. They are speaking with Staff Sgt. Shane Baldwin from Hope, Ark., who was severely wounded by an IED in Afghanistan. Pool (AP Photo/J. Scott Applewhite)

Crown Prince Frederik and Crown Princess Mary of Denmark, petting a service dog named Raleigh, visit wounded soldiers who are receiving physical therapy at the Walter Reed Army Medical Center in Washington, Friday, June 4, 2010. At right is Army Spcl. Kyle McNamara, an infantryman with the 82nd Airborne from Ft. Bragg, N.C., who was wounded in Afghanistan by an anti-personnel mine. His wife, Katie, listens at left. Pool (AP Photo/J. Scott Applewhite)

Staff Sgt. Shane Baldwin from Hope, Ark., who was severely wounded by an IED in Afghanistan, prepares a strap-on weight to exercise his leg during physical therapy at the Walter Reed Army Medical Center in Washington, Friday, June 4, 2010. Baldwin was riding in a heavily armored MRAP vehicle during the explosion that claimed his left leg. Baldwin met Crown Prince Frederik and Crown Princess Mary of Denmark during their visit to Walter Reed today. Pool (AP Photo/J. Scott Applewhite)

Crown Prince Frederik and Crown Princess Mary of Denmark visit wounded soldiers who are receiving physical therapy at the Walter Reed Army Medical Center in Washington, Friday, June 4, 2010. At right is Army Spcl. Kyle McNamara, an infantryman with the 82nd Airborne from Ft. Bragg, N.C., who was wounded in Afghanistan by an anti-personnel mine. His wife, Katie, listens at left. Pool (AP Photo/J. Scott Applewhite)

Crown Prince Frederik and Crown Princess Mary of Denmark visit soldiers recovering from combat wounds as they receive physical therapy at the Walter Reed Army Medical Center in Washington, Friday, June 4, 2010. At right is Staff Sgt. Shane Baldwin from Hope, Ark., who was severely wounded by an IED in Afghanistan. Pool (AP Photo/J. Scott Applewhite)

Crown Prince Frederik and Crown Princess Mary of Denmark arrive to visit soldiers recovering from combat wounds at the Walter Reed Army Medical Center in Washington, Friday, June 4, 2010. Pool (AP Photo/J. Scott Applewhite)

Crown Prince Frederik and Crown Princess Mary of Denmark visit wounded soldiers who are receiving physical therapy at the Walter Reed Army Medical Center in Washington, Friday, June 4, 2010. At right is Army Spcl. Kyle McNamara, an infantryman with the 82nd Airborne from Ft. Bragg, N.C., who was wounded in Afghanistan by an anti-personnel mine. His wife, Katie, listens at left. At far left, Col. Norvell V. Coots, commander of Walter Reed Army Medical Center, watches Raleigh, a service dog. Pool (AP Photo/J. Scott Applewhite)