Antigovernment protesters sit on the ground as they listen to a Friday prayers' speech during a demonstration demanding the resignation of Yemeni President Ali Abdullah Saleh, in Sanaa, Yemen. Tens of thousands of Yemenis held a mass funeral Friday for 50 people killed in regime-sponsored violence in the capital. Hani Mohammed/AP
US President Barack Obama boards Air Force One at Andrews Air Force Base near Washington. Jim Young/Reuters
Switzerland's national soccer team goal keepers warm up during a training session at Wembley stadium in north London. Switzerland will play an Euro 2012 qualifying soccer match against England on June 4. Andrew Winning /Reuters
Poverty-stricken Pakistani children get free food at a charity outlet in Karachi, Pakistan. Pakistan said Friday it was aiming to broaden its tax base in the next fiscal year, part of budget measures to fund a budget deficit and revive an economy battered by years of mismanagement, floods, and surging violence by Islamist militants. Shakil Adil/AP
Bosnian Muslim women from Srebrenica, sitting in a room with the walls covered with pictures of victims of the Srebrenica massacre, watch a televised broadcast of former Bosnian Serb military chief Gen. Ratko Mladic's court proceedings at The Hague, Netherlands, in Tuzla, north of Sarajevo, Bosnia. Mladic told a United Nations war crimes court he is 'a gravely ill man' and refused to enter pleas to 'obnoxious charges' alleging he orchestrated the worst atrocities of a war that claimed 100,000 lives. Amel Emric/AP
A student monk from the Inter University Bikkhu federation attaches an antigovernment poster to a security barrier in front of the residence of Sri Lanka's President Mahinda Rajapaksa in Colombo. The undergraduate monks demonstrated after a union protester died and at least 200 others were injured during Monday's clashes in Katunayake between police and workers over a government pension proposal. The posters read: 'Arrest those who killed student Buddhist monk Sunanada,' in reference to a student who committed suicide after the university withheld his results. Dinuka Liyanawatte/Reuters
The Popocatepetl volcano spews a cloud of ash and steam high into the air as seen from Puebla, 62 miles east of Mexico City. Reuters
Rafael Nadal of Spain reacts after winning his semi-final match against Andy Murray of Britain at the French Open tennis tournament at the Roland Garros stadium in Paris. Benoit Tessier/Reuters
Sukanya Roy of South Abington Township, Pa., reacts after winning the National Spelling Bee, in Oxon Hill, Md. late Thursday, June 2. She won by spelling the word 'cymotrichous,' which means wavy hair. Jacquelyn Martin/AP
Shopper Rachel Rodriguez carries bridal dresses during the Filene's Basement 'Running of the Brides' bridal dress sale in New York. The annual sale is known for its long queues and frantic shopping among brides-to-be hoping to save hundreds or even thousands of dollars on designer wedding gowns. Shannon Stapleton/Reuters
Chinese brides dance in front of the south Bavarian castle, Neuschwanstein in Schwangau near Fuessen. Thirty-one Chinese couples who already got married in China, traveled to Germany to repeat their promise of marriage at Neuschwanstein Castle, one of the most popular destinations in Europe. Michaela Rehle /Reuters
A supporter waits for the arrival of Portuguese Social Democrat Party leader Pedro Passos Coelho during a rally at the Ribiera market in Lisbon. Portugal holds a snap general election on Sunday, June 5, which could end months of political and economic turmoil as the next government gets down to enacting tough austerity under a 78-billion-euro bailout. Rafael Marchante/Reuters
A laborer works on a steel structure at a financial building construction site, as the cityscape is seen amid smoke from burning straw, in Hefei, Anhui. Growing evidence that China's roaring economy is starting to slow has fed an investor debate about whether the world's growth engine is gently easing or headed for a sharp downturn. Reuters
The talks on South Sudan came on the sidelines of Obama's visit to Ethiopia, his second stop on a trip to East Africa.
ByJulie Pace and Darlene Superville, Associated Press
President Obama launched a personal push for peace in South Sudan on Monday, convening African leaders for urgent talks in neighboring Ethiopia aimed at keeping the world's newest nation from collapsing amid civil war.