President Barack Obama and British Prime Minister David Cameron help students paint a mural during a visit to the Enniskillen Integrated Primary School in Enniskillen, Northern Ireland, Monday, June 17, 2013. The visit takes place before leaders from the G-8 nations are to gather to discuss the ongoing conflict in Syria, and free-trade issues. (AP Photo/Evan Vucci)

G8 exposes rift among leaders on Syria

British Prime Minister David Cameron says Russia, like all G-8 governments, has a responsibility to push opposed factions in Syria’s civil w…