Britain's Prince Harry, center, poses with women's gold medal winner Mary Keitany of Kenya, left, and men's gold medal winner Wilson Kipsang of Kenya in front of Buckingham Palace after the 2012 London Marathon on April 22, 2012.
Britain's Prince Harry poses with women's wheelchair second-place winner, Japan's Wakako Tsuchida, during a presentation in the London Marathon, on April 22, 2012.
Britain's Queen Elizabeth II, center, visits the Gloriana, the royal barge in which the queen and other members of the royal family will travel during the Diamond Jubilee river pageant in June, during a viewing at Greenland Pier in Greenwich, east London, on April 25, 2012. The Queen will ride in Gloriana during the 1000-boat river pageant in honor of her 60 years on the throne.
Queen Elizabeth II and Prince Philip, Duke of Edinburgh, stand by a collection of Merchant Navy figureheads during a visit to the Cutty Sark on April 25, 2012, in Greenwich, England.
Queen Elizabeth II and Prince Philip, Duke of Edinburgh, observe a presentation during a visit to the Cutty Sark on April 25, 2012, in Greenwich, England.
Queen Elizabeth II, accompanied by the Dean, the Rev. John Lewis, leaves after a service at Llandaff Cathedral in Cardiff, Wales, on April 26, 2012. The queen was on a two-day tour of Wales as part of a U.K.-wide tour to celebrate her Diamond Jubilee.
Queen Elizabeth II meets members of the Young Dragons as she visits Cyfarthfa High School and Cyfarthfa Castle Museum in Merthyr during a visit to Wales on April 26, 2012, as part of a U.K.-wide tour to celebrate her Diamond Jubilee.
Queen Elizabeth II and Prince Philip traveled March 29, 2012, to the Krishna Avanti School in Harrow, where they viewed dance and musical performances by school children and local groups. They also met civic and community leaders and viewed the 60 faces photographic exhibition.
Queen Elizabeth II and Prince Philip traveled March 29, 2012, to the Krishna Avanti School in Harrow, where they viewed dance and musical performances by school children and local groups. They also met civic and community leaders and viewed the 60 faces photographic exhibition.
Queen Elizabeth II, accompanied by Prince Philip, Duke of Edinburgh, second left, presents Sir Donald Gosling, third right, with a flag during a ceremony to install him as Vice Admiral of the U.K. at Windsor Castle on April 23, 2012, in Windsor, Berkshire, England. Also attending were Deputy Chief of Naval Staff Admiral George Zambellas,leftk First Sea Lord Admiral Sir Mark Stanhope, second right, and Second Sea Lord, Vice Admiral Charles Montgomery, right.
South African Naval officer Admiral Kobus Louw, left, speaks with Britain's Princess Anne as she visits a naval base in Simon's Town situated on the outskirts of Cape Town, South Africa, April 18, 2012. Anne, only daughter of Queen Elizabeth II, is on a three day visit to South Africa as part of her mother's Diamond Jubilee celebrations.
Britain's Princess Anne looks back as she arrives for a visit at a naval base in Simon's Town situated on the outskirts of Cape Town, South Africa, April 18, 2012.
Prince Edward, Earl of Wessex, attends the Films Without Borders launch at the St. Regis Hotel on April 24, 2012, in New York. The youngest son of Queen Elizabeth II, the prince is on a five-day U.S. tour to mark his mother's Diamond Jubilee.
Britain's Prince Edward, center, and Philadelphia Mayor Michael Nutter, left, take part in a tree planting ceremony at Girard College, a boarding school for underprivileged students, April 26, 2012, in Philadelphia. Prince Edward is touring the United States in honor of the Diamond Jubilee of his mother, Queen Elizabeth II, now in her 60th year on the throne.
Spain
Spanish King Juan Carlos leaves San Jose hospital on April 18, 2012, in Madrid where he was hospitalized after breaking his hip on an African elephant hunting trip.
Spanish royals, from left, Princess Leonor, Prince Felipe, Princess Letizia and Princess Sofia visit King Juan Carlos of Spain at San Jose Hospital on April 15, 2012, in Madrid. King Juan Carlos of Spain underwent an operation on his right hip after he fractured it in a fall during a private visit to Botswana.
Princess Sofia of Spain visits King Juan Carlos of Spain at San Jose Hospital on April 15, 2012, in Madrid. King Juan Carlos of Spain underwent an operation on his right hip after he fractured it in a fall during a private visit to Botswana.
Princess Letizia of Spain visits King Juan Carlos of Spain at San Jose Hospital on April 15, 2012, in Madrid. King Juan Carlos of Spain underwent an operation on his right hip after he fractured it in a fall during a private visit to Botswana.
Spanish King Juan Carlos leaves San Jose hospital on April 18, 2012, in Madrid where he was hospitalized after breaking his hip on an African elephant hunting trip.
Prince Felipe of Spain,center, Princess Letizia of Spain speak with Carmen Balcells, right, at a lunch for the 2012 Cervantes Award at The Royal Palace in Madrid on April 20, 2012
Prince Felipe of Spain, center, Princess Letizia of Spain speak with Carmen Balcells, right, at a lunch for the 2012 Cervantes Award at The Royal Palace in Madrid on April 20, 2012.
Crown Prince Felipe of Spain delivers a speech at the Repsol Refinery Extension on April 18, 2012, in Cartagena, Colombia. Repsol's majority stake in oil firm YPF has been wiped out after the 51 percent of the company was seized by the Argentina's government.
Princess Letizia of Spain attends'Club Internacional de Prensa 50th Anniversary party at Jardines de Cecilio Rodriguez on April 18, 2012, in Madrid.
Prince Felipe of Spain and his wife, Princess Letizia, attend the 5th Centenary of Hospital Reial Y General l on April 17, 2012, in Valencia, Spain.
Queen Sofia of Spain attends "Encuadernaciones en las Bibliotecas Reales" exhibition at Royal Palace on April 24, 2012, in Madrid.
Princess Letizia of Spain, center, attends STELA Business Club Annual Dinner at 3 Olivos Center on April 11, 2012, in Madrid.
Luxembourg
Berlin mayor Klaus Wowereit, left, Grand Duke Henri of Luxembourg, right, and Grand Duchess Maria Teresa pose for the media in front of the Charlottenburg palace in Berlin, April 23, 2012.
German President Joachim Gauck, right, and his partner Daniela Schadt, left, welcome the Grand Duke of Luxembourg, second right, and his wife, the Grand Duchess of Luxembourg, Maria Teresa, second left, at the Bellevue palace in Berlin, on April 23, 2012
Japan
Japan's Emperor Akihito, left, and Empress Michiko, second left, greet guests during a spring garden party hosted by the Japanese monarch at the Akasaka Palace imperial garden in Tokyo on April 19, 2012.
British Prime Minister David Cameron, left, shakes hands with Emperor Akihito of Japan at the Imperial Palace on April 10, 2012, in Tokyo. Cameron was on a four-day visit to East and Southeast Asia, seeking to boost trade opportunities for the United Kingdom.
Japanese Emperor Akihito, right, and Bahraini King Hamad bin Isa al-Khalifa, left, attend a luncheon at the Imperial Palace in Tokyo, April 12, 2012.
Monaco
Princess Caroline of Hanover reacts after the performance of Monaco's skater Kim Lucine in the men's free skating at the 2012 World Figure skating Championships in Nice, southern France, March 31, 2012.
Princess Caroline of Hanover and her daughter Alexandra react after the performance of Monaco's skater Kim Lucine in the men's free skating at the 2012 World Figure skating Championships in Nice, southern France, March 31, 2012.
Princess Caroline of Hanover and her daughter Alexandra chat with Prince Albert II after the performance of Monaco's skater Kim Lucine in the men's free skating at the 2012 World Figure skating Championships in Nice, southern France, March 31, 2012.
Serbian world number one tennis player Novak Djokovic, left, poses beside his companon Jelena Ristic second left, with Princess Charlene of Monaco, center, and Prince Albert II of Monaco, right, after receiving the Vermeil Medal for Physical Education and Sports during the Monte-Carlo ATP Masters Series Tennis Tournament on April 16, 2012, in Monaco.