Clowns, clowns, and more clowns, fireworks, endangered frogs (15 images)

Clowns throw another clown in the air during the 14th International Clown Convention in Mexico City. Hundreds of clowns from throughout Latin America are meeting this week in Mexico City, taking part in contests, parades and mass photos as part of the convention. (AP Photo/Gregory Bull)

A clown performs during a makeup competition at the 14th International Clown Convention in Mexico City. Hundreds of clowns from throughout Latin America are meeting this week in Mexico City, taking part in contests, parades and mass photos as part of the convention. (AP Photo/Gregory Bull)

Two clowns talk during the 14th International Clown Convention in Mexico City. Hundreds of clowns from throughout Latin America are meeting this week in Mexico City, taking part in contests, parades and mass photos as part of the convention. (AP Photo/Gregory Bull)

Soccer fans of Besiktas Istanbul use fireworks during the UEFA Champions League Groupb B soccer match between VfL Wolfsburg and Besiktas Istanbul in Wolfsburg, Germany.(AP Photo/Fabian Bimmer)

Juventus' Felipe Melo, at left, in action during the Group A Champions League soccer match between Juventus and Maccabi Haifa at the Turin Olympic stadium, Italy. Juventus won 1-0. (AP Photo/Massimo Pinca)

Clive Owen and wife Sarah-Jane Fenton arrive for the premiere of 'The Boys Are Back' during the Times BFI 53rd London Film Festival at the Vue West End in London, England. (Photo by Samir Hussein/Getty Images)

Kief Joshua Manning taking a wine sample from a barrel at his winery in Elgin, Ariz. (AP Photo/Matt York)

Riot police stand guard next to supporters of Honduras' ousted President Manuel Zelaya during a protest demanding Zelaya's return to power in Tegucigalpa. Residents of the Brazilian embassy where Zelaya is holed up, are complaining about loud music broadcast over loudspeakers by soldiers posted around the embassy. (AP Photo/Arnulfo Franco)

An endangered Agalychnis annae, commonly known as a Blue-Sided Leaf Frog, is seen at National Biodiversity Institute of Costa Rica, INBio, in Heredia, Costa Rica. Alexander Barrientos, a scientist at INBio, said that the endangered tree frog of the Hylidae family native to Costa Rica was able to reproduce at INBio, and that they were investigating the possibility of breeding other species of frogs in danger of extinction. (AP Photo/Kent Gilbert)

A visitor strolls through the Vienna sewer during a guided tour. Six decades after "The Third Man" was premiered in London in September of 1949, tourists from around the world pound the Austrian capital's pavements, and even slip into its sewers, to see where the much-acclaimed motion picture was set. (AP Photo/Lilli Strauss)

Boston College student Mark Bronzo, of White Plains, N.Y., left, uses a permanent marker while drawing on a replica of a portion of the Berlin Wall on the school's campus. The sculpture, meant to commemorate the 20th anniversary of the fall of the Berlin Wall, was created by artist Mark Cooper with the help of Boston College students. (AP Photo/Steven Senne)

Head of U.S. and NATO forces in Afghanistan, U.S. Gen. Stanley McChrystal, works on his laptop onboard a C-130 aircraft after attending a meeting with Commanders of Regional Command - North and Afghan National Security Force, ANSF, delegation in Mazar-e-Sharif, north of Kabul, Afghanistan. (AP Photo/Altaf Qadri)

People play in the spray of waves hitting the sea wall as Tropical Storm Rick hits Mazatlan, Mexico. Tropical Storm Rick weakened rapidly as it headed for Mexico's Pacific coast after sparing Baja California's resorts a direct blow. (AP Photo/Guillermo Arias)

A hotel worker looks out at the ocean as Tropical Storm Rick hits Mazatlan, Mexico. Tropical Storm Rick weakened rapidly as it headed for Mexico's Pacific coast after sparing Baja California's resorts a direct blow. (AP Photo/Guillermo Arias)

A soldier takes a photo holding a sign that reads 'Long live to Chiri and to Democracy" on a roof near Brazil's embassy in Tegucigalpa. Residents of the Brazilian embassy where Honduras' ousted President Manuel Zelaya is holed up, are complaining about loud music broadcast over loudspeakers by soldiers posted around the embassy. Hondurans usually refer to the country's army as the "Chiri".(AP Photo/Esteban Felix)