Dark clouds of smoke and fire are seen as oil burns during a controlled fire in the Gulf of Mexico on Thursday. The U.S. Coast Guard, working in partnership with BP, local residents, and other federal agencies conducted the in situ burn to aid in preventing the spread of oil following the April 20 explosion on the offshore drilling oil rig, Deepwater Horizon. Mass Communication Specialist 2nd Class Justin Stumberg/US Navy/Reuters
A ring-tailed lemur soaks up warmth under a heat lamp at Expedition Madagascar, a new exhibit at the Henry Doorly Zoo in Omaha, Neb., on Friday. Nati Harnik/AP
A Thai soldier rests as people walk by during his lunch break at the main business district in Bangkok, Thailand, on Friday. A peace plan to end weeks of deadly protests in Thailand has stalled as the government and protesters argue over details, including an early election in mid-November. Jerry Lampen/Reuters
The Dalai Lama speaks during an interview with the Associated Press at his office in Dharamsala, India, on Friday. The Tibetan leader warned that his people's exile movement must press forward with its talks with the Chinese government despite years of negotiations that have resulted in almost no progress. The Dalai Lama warned it could be decades until any benefits are obvious. Kevin Frayer/AP
Young Afghan cyclists look at the guard tower in front of Camp Nathan Smith in Kandahar, Afghanistan, on Friday. Nikola Solic/Reuters
Williams Formula One driver Nico Hulkenberg from Germany adjusts his balaclava in his team box at the track in Montmelo just outside Barcelona, Spain, on Friday ahead of Sunday's Spanish Grand Prix. David Ramos/AP
A 9-month-old koala clings to his mother at the Cleveland Metroparks Zoo in Cleveland, on Friday. Amy Sancetta/AP
Election results are projected onto Big Ben in London on Friday. Britain's two main parties were locked in a power struggle Friday after an inconclusive election - with Labour's Gordon Brown suggesting he would try to form a coalition and Conservative leader David Cameron insisting the prime minister no longer had a mandate to govern. Tom Hevezi/AP
A containment vessel is lowered into the Gulf of Mexico at the site of the Deepwater Horizon rig collapse on Thursday. Gerald Herbert/AP
Golfer Ryan Moore is reflected in a pond on the island green 17th hole as an alligator swims past during second round play of the Tournament Players Championship PGA golf tournament at TPC Sawgrass in Ponte Vedra Beach, Fla., on Friday. Hans Deryk/Reuters
Ricardo Garcia, dressed as a soldier, holds his mother's hand has he marches along side soldiers during a military parade commemorating Soldiers Day in San Salvador, on Friday. Luis Romero/AP
Norway's Petter Solberg drives his Citroen car during super Stage 6 at the New Zealand Rally in Northland, New Zealand, on Friday. Wayne Drought/NZPA/AP
The abduction and apparent murder of 43 college students has forced President Peña Nieto's hand. On Thursday, he promised sweeping security reforms. But many doubt if he can break a culture of impunity.
Mexican President Enrique Peña Nieto vowed Thursday to overhaul local policing and more firmly establish the rule of law across the country, his strongest response yet to the apparent massacre of 43 students.