This Week in Photos, Week of Feb. 17-23, 2012

Japanese children wear loincloths as they splash about in freezing cold water during Saidaiji Naked Festival, at Saidaiji Temple on Feb. 18 in Okayama, Japan. The festival is one of Japan's more quirky ones.

A reveler, from the Vila Isabel samba school, parades on the first night of the annual Carnival parade in Rio de Janeiro's Sambadrome.

Models walk the catwalk during Kinder Aggugini show at the Embankment Show Space at London Fashion Week Autumn/Winter 2012.

Kyle Busch, driver of the No. 18 M&M's Brown Toyota, waves the checkered flag after winning the NASCAR Budweiser Shootout at Daytona International Speedway on Feb. 18 in Daytona Beach, FL.

Pope Benedict XVI arrives at St. Peter's Basilica to attend Mass with newly appointed cardinals on Feb. 19 in Vatican City.

A boy in a uniform, similar to those usually worn by Venezuelan President Hugo Chavez, and 2 girls play during a Carnival parade in Caracas, Venezuela.

Qin Kai and Yutong Luo of China take a dive during the Men's Synchronized 3M Springboard Prelim at London's Aquatics Centre on Feb. 20.

Carnival revelers accompany a float in the Rose Monday parade on Feb. 20 in Cologne, Germany. Rose Monday is the highpoint of the Carnival season, which traditionally runs from Epiphany until Ash Wednesday, and is celebrated in cities throughout the Rhine region of western Germany.

President Obama attends the National Museum of African-American History and Culture's groundbreaking ceremony.

Revelers dance during Mardi Gras festivities on Bourbon Street in the French Quarter of New Orleans.

Ivet Lalova of Bulgaria competes during the 60-meter heat at the Aviva Grand Prix at the National Indoor Arena on Feb. 18 in Birmingham, England.

Actor and comedian Will Ferrell tosses beads and doubloons to fans as he reigns as King of Bacchus in the 2012 Krewe of Bacchus Parade on Feb. 19 in New Orleans.

Two men play mas during J'ouvert celebrations marking the start of the Trinidad Carnival street parade in Port of Spain.

A green water dragon is displayed at the Frankfurt Animal Lounge at the airport in Frankfurt.