Horses race in the 138th Kentucky Derby, Cinco de Mayo is celebrated around the world, and chihuahuas parade around Kansas City, MO.
Men on stilts dressed as chimney sweeps take part in the Sweeps Festival in Rochester, England. The annual festival dates back 400 years and was originally the one day of the year that the chimney sweeps could afford time off to celebrate the coming of spring
Mario Gutierrez (R) reacts after winning the 138th running of the Kentucky Derby at Churchill Downs in Louisville, KY
Floyd Mayweather Jr. celebrates after defeating Miguel Cotto by unanimous decision during the WBA Super Welterweight title fight at the MGM Grand Garden Arena in Las Vegas.
British boxer Alexander Loukos waves as he runs with the Olympic flame during the Olympic torch relay at the site of ancient Olympia in Greece.
People walk beside a creation by Cuban-American artist Jose Parla and French artist J.R. on a street wall in Havana. The work is part of the upcoming 11th Havana Biennial contemporary art exhibition.
A guest celebrates with “MOET Toast to the Derby” at the 138th Kentucky Derby at Churchill Downs in Louisville, KY.
Wranglers travel up a train rail line during Montana Horses' annual horse drive outside Three Forks, MT. The horses will be picked up by leasers to be used as pack and trail horses at dude ranches and national parks.
Riders during the team time trial of the Giro d'Italia in Verona.
Buddhist monks celebrate Vesak Day in Magelang, Indonesia. Each year during the full moon in May or June, Buddhists celebrate the 3 stages of life of Gautama Buddha, the religion’s founder: his birth, his enlightenment to nirvana and his passing.
A view of the set-up of the exhibit "Excentrique(s).” French conceptual artist Daniel Buren is now the fifth artist to participate in the annual Monumenta project, in which famous artists are given the freedom to completely take over the Nave of the Grand Palais in Paris.
Dogs and their humans walk in the ''Chihuahua Parade'' in Kansas City, MO. The Cinco de Mayo event drew 492 dogs of all breeds … plus 1 pot-bellied pig .
Greek actress Ino Menegaki lights the Olympic flame during a dress rehearsal for the torch-lighting ceremony of the London 2012 Olympic Games.
People walk through exhibits at the first New York Frieze Art Fair in New York City. Held on Randall’s Island, the London-based arts fair will display 182 contemporary galleries from 30 countries under a 250,000-square-foot tent.
The Ballet Folklorico Mexicano performs during a Cinco de Mayo reception in the Rose Garden at the White House in Washington, DC.
Passersby photograph one of the dismantled pieces of “Forever Marilyn,” a sculpture by Seward Johnson, as it is prepared for removal from Pioneer Court in Chicago. The stainless steel and aluminum sculpture will next be displayed in Palm Springs, CA.
Casey Hauser competes in the Santa Cruz Goya Windsurfing Festival at Waddell Beach in Santa Cruz, CA. The festival is the first stop on the American Windsurfing Tour.
Queen Elizabeth II attends the state opening of Parliament.