The government of Colombia and the National Liberation Army (ELN) closed the fourth cycle of peace talks, in Caracas, Venezuela Russian president Vladimir Putin said his country is willing to return to the black sea agreement, in a meeting with Turkish president Recep Tayyip Erdogan in Russia’s coastal city of SochiAfrica’s first climate summit opened in Nairobi, Kenya, with a plea for delegates to identify opportunities that may arise from solving environmental problems.