Danish Crown Prince Frederik, left, and Crown Princess Mary talk to reporters after the formal groundbreaking of two plants by the Danish wind-turbine maker Vestas near Brighton, Colo., on Wednesday, March 25, 2009. The Danish heir and his Australian-born wife were on a tour of the U.S. to promote Danish industries and good relations with American businesses.
Danish Crown Prince Frederik, second from left, laughs as Crown Princess Mary tosses a shovel of dirt while Colorado Governor Bill Ritter, right, and Ole Borup Jakobsen, president of Vestas, far left, look on during the formal groundbreaking of two plants by the Danish wind-turbine maker near Brighton, Colo., on March 25, 2009.
Danish Crown Prince Frederik, second from right, is trailed by Crown Princess Mary, left, while being led into a tent by Ole Borup Jakobsen, right, president of Vestas, for the groundbreaking of two plants by the Danish wind-turbine maker near Brighton, Colo., March 25, 2009. Recovering from a sledding injury, the prince used crutches to get around.
Danish Crown Prince Frederik, center, jokes with Ole Borup Jakobsen, president of Vestas, during speeches before the formal groundbreaking of two plants by the Danish wind-turbine maker near Brighton, Colo., on Wednesday, March 25, 2009.
Danish Crown Prince Frederik and Crown Princess Mary are greeted by Ole Borup Jakobsen, right, president of Vestas Blades, for the groundbreaking of two plants near Brighton, Colo., on Wednesday, March 25, 2009.
Danish Crown Prince Frederik and Crown Princess Mary pose on Monday, March 23, 2009, by the Chicago sculpture "Cloud Gate," also known locally as "The Bean." The city of Chicago is reflected in the artwork behind, which dominates the area in Chicago's Millennium Park.
Danish Crown Prince Frederik looks out from a "green car" after his tour of the sculpture "Cloud Gate," also known locally as "The Bean," upper left, at Chicago's Millennium Park during the Danish Royal family's trip to the city Monday, March 23, 2009. Their flight to Chicago was delayed in Copenhagen by a bomb hoax.
Danish Crown Prince Frederik points with his crutch as he and Chicago Mayor Richard M. Daley, left, and his wife, Maggie, right, look at their reflections on the sculpture "Cloud Gate," also known locally as "The Bean," in Millennium Park during their visit to Chicago on Monday, March 23, 2009.
Danish Crown Prince Frederik, center, Crown Princess Mary, second from left, Maggie Daley, left, wife of Chicago Mayor Richard M. Daley, right, arrive at Chicago's Millennium Park for a tour of the sculpture "Cloud Gate," also known locally as "The Bean," during the royal family's trip to the city Monday, March 23, 2009.
Danish Crown Prince Frederik and Crown Princess Mary pose by the sculpture "Cloud Gate," also known locally as "The Bean," in Chicago's Millennium Park during their visit to the city on Monday, March 23, 2009. Frederik, 40, is the elder son of Denmark's of Queen Margrethe II and her French-born consort, Prince Henrik.
Danish Crown Prince Frederik and Crown Princess Mary huddle at a ceremony bestowing an honorary doctorate of Humane Letters on the prince, on a visit to Dana College in Blair, Neb., Tuesday, March 24, 2009.
Danish Crown Prince Frederik delivers the keynote address at a ceremony bestowing an honorary doctorate of Humane Letters to him, during a visit to Dana College in Blair, Neb., Tuesday, March 24, 2009. The crown prince said Dana is one of only two U.S. colleges founded by Danish immigrants, so he considers it a special place.
Danish Crown Prince Frederik, right, pretends to use his crutch as a shovel, as Crown Princess Mary and Lars Hansen, president of Novozymes North America, shovel to plant a tree during a cornerstone ceremony for a new Novozymes factory in Blair, Neb., Tuesday, March 24, 2009.
Danish Crown Princess Mary meets with kindergarten children during a visit to Dana College in Blair, Neb., Tuesday, March 24, 2009. The royal couple helped mark the college's 125th anniversary and attended a Danish company's groundbreaking on a new ethanol enzyme plant being built just south of Blair.
Danish Crown Princess Mary walks past a replica of The Little Mermaid statue during a visit to Dana College in Blair, Neb., Tuesday, March 24, 2009. She has two children, one of whom accompanied her on the trip.
Crown Prince Frederik and Crown Princess Mary of Denmark arrive at the American-Scandinavian Foundation's Annual Gala Friday, March 27, 2009, in New York. New York was their final stop on a five-day tour of the U.S.
Prince Frederik and Princess Mary are flanked by Nikolaj Hubbe, artistic director of the Royal Danish Ballet, left and Socialite Deeda Blair, left, at the American-Scandinavian Foundation's (ASF) Annual Gala Friday, March 27, 2009, in New York. Hubbe and Blair received the ASF Cultural and Distinguished Public Service Awards, respectively.
Crown Prince Frederik and Crown Princess Mary of Denmark arrive at the American-Scandinavian Foundation's Annual Gala Friday, March 27, 2009, in New York. The prince and Danish Deputy Prime Minister Bendt Bendtsen opened the New York Stock Exchange earlier that day.