A child dressed as clown attends a mass at the Basilica of Guadalupe in Mexico City on Wednesday. Hundreds of clowns took part in the annual event to thank the Virgin of Guadalupe for helping them find work through the year, according to local media. Henry Romero/Reuters
An American flag is placed in a dirt-filled barrier outside the headquarters of 3rd Platoon, 1-320 Field Artillery Regiment, 101st Airborne Division, at Combat Outpost Nolen in the Arghandab Valley north of Kandahar, Afghanistan, on Thursday. Bob Strong/Reuters
An Adelieledone polymorpha, one of the four new species of octopuses that researchers have discovered in Antarctica that come replete with antifreeze venom, is seen here. University of Melbourne/Reuters
Aerobatic team The Blades perform at the Farnborough International Airshow in southern England on Thursday. Luke MacGregor/Reuters
Cheney Dale takes nap with the cows on Thursday at the Tippecanoe County 4-H Fair in Lafayette, Ind. Michael Heinz/Journal & Courier/AP
The hand of a worker involved in the cleanup of the Dalian oil spill is seen at Nanhaitun in Dalian, Liaoning Province, China, on Wednesday. Oil imports were still blocked at the major Chinese port of Dalian on Tuesday following a fire and oil slick, while authorities recruited an additional 500 fishing boats to help with the cleanup. Jiang He/Reuters
Rescued penguins wait to be fed by members of S.O.S Rescate Fauna Marina, an NGO, in Piriapolis, Uruguay, on Thursday. Some 200 penguins, migrating from Patagonia, Argentina, arrived at the Uruguayan coast recently covered with oil and most of them have died, according to the marina. They hope to rescue the rest and release them back into the wild once they have recuperated. The source of the oil slick is unknown. Andres Stapff/Reuters
Vancouver Olympics 2010 women's figure skating gold medalist Kim Yu-na of South Korea, center, skates with former US figure skater Michelle Kwan, right, and Turin Olympic 2006 women's figure silver medalist Sasha Cohen of the United States during a rehearsal in Goyang, South Korea, on Thursday. They will participate in the Samsung Anycall-Hauzen 2010 All That Skate Summer ice show to start July. 23 through July 25 in Goyang. Ahn Young-joon/AP
The Minneapolis skyline rises in the background as Chase Hazen of Discovery Bay, Calif., practices in the surf division during the World Wakesurfing Championships on the Mississippi River as part of the part of the Aquatennial Festival on Thursday in Minnesota. Wakesurfers start with the aid of a tow rope which they release and then surf a boat's wake. Jim Mone/AP
US Treasury Secretary Timothy Geithner is seen at the St. Regis Hotel on Obama will look at changing the tax code next year. Michael Bonfigli/The Christian Science Monitor
Workers and neighbors help clear debris from a barn destroyed by a severe storm at the Benson dairy farm on Thursday in Gorham, Maine. The storm, which triggered tornado warnings, knocked out power to 22,000 residents, flooded roads, damaged homes, and uprooted trees across southern and coastal Maine. Robert F. Bukaty/AP
President Obama receives a briefing in the Situation Room of the White House on the BP oil spill in the Gulf of Mexico, on Wednesday. Taking part in the meeting are, clockwise from top: Homeland Security Secretary Janet Napolitano, national incident commander Adm. Thad Allen, Environmental Protection Agency administrator Lisa P. Jackson, US Coast Guard Rear Adm. Peter Neffenger, press secretary Robert Gibbs, Interior Secretary Ken Salazar, NOAA administrator Jane Lubchenco, Energy Secretary Steven Chu, and Chief of Staff Rahm Emanuel. Pete Souza/AP
Australian freestyle motocross rider Robbie Maddison performs during the first training of the fourth stage of the Red Bull X-Fighters World Tour in Madrid on Thursday. Joerg Mitter/Reuters
An Andean woman wishes luck to a fighter named "Hatun Runa," which means "Big Person" in Quechua dialect, before the Takanacuy fighting demonstration in Lima, Peru, on Thursday. The Takanacuy ceremonial fight is a traditional Inca celebration in the highlands where indigenous people resolve personal differences, family reputation, or economic problems. Pilar Olivares/Reuters
The US and Turkey have designated a zone in northern Syria for flushing out Islamic State. Jordan is also considering a similar zone in southern Syria, as President Bashar al-Assad is forced to pull back his forces.
The agreement between the United States and Turkey to establish some form of protected zone in northern Syria that is free of the extremist Islamic State heralds a potentially significant shift in Syria’s grueling civil war.