Juan Martin Torresi arrives at the 1-11-14 slum's church to attend a mass in honor of Pope Francis in Buenos Aires, Argentina, Thursday, March 13, 2014. On the day of the first anniversary of the Pope's election, people from the 1-11-14 slum gather at their church to watch an interview that Pope Francis gave recently from his residence at the Vatican to FM Bajo Flores, a community radio station that broadcasts from the slum. (AP Photo/Natacha Pisarenko)

Francis celebrates one year as pope

As Argentina's top Roman Catholic leader before he was elected pope, Jorge Mario Bergoglio assigned many priests to parishes in the crowded …

President Barack Obama, right, talks with Ukraine Prime Minister Arseniy Yatsenyuk, left, in the Oval Office of the White House in Washington, Wednesday, March 12, 2014. Obama welcomed Ukraine’s new prime minister as the U.S. seeks to highlight ties with the former Soviet republic now caught in a diplomatic battle between East and West.(AP Photo/Pablo Martinez Monsivais)

UN is discussing Ukraine resolution

The U.N. Security Council is discussing a possible resolution that would reaffirm Ukraine's sovereignty and territorial integrity and addres…

In this Feb. 20, 2014 file photo, activists evacuate a wounded protester during clashes with police in Kiev's Independence Square, the epicenter of the country's current unrest, Kiev, Ukraine. As questions circulate about who was behind the lethal snipers that sowed death and terror in Ukraine's capital, doctors and others told the AP the similarity of bullets wounds suffered by opposition victims and police indicates the snipers were specifically trying to stoke tensions and spark a larger, angrier clash between opposition fighters and government security forces.  (AP Photo/Efrem Lukatsky, file)

Russia, Ukraine feud over sniper carnage

That riddle has become the latest flashpoint of feuding over Ukraine, with the nation's fledgling government and the Kremlin giving starkly …