. >> germany's foreign minister frank walter steinmeyer has arrived. what are expected to be intense discussion he. one session between the u.s. secretary of state john kerry and iranian foreign minister moasmedmohamed javad zarif talks continual throughout the day. >> evening night. whenever. >> the u.s. energy secretary ernest monez heading the technical discussions for his country, is giving nothing away. >> mr. secretary, are things going well? >> they are going. >> do you hope to have an agreement this weekend. >> they are going. >> germany's foreign minister has told reporters when he looks at the plts mountains it reminds him the hardest climb is at the end. that's where they are. james bays, lausanne. >>> the attacks happened in towns of biri in gombe state. voting in nigeria's presidential poll has been extended for a second day. decision comes after violence and technical problems caused some voting centers to close. yvonne ndege reports from the capital, abuja. >> rafael cast his vote for a new president and parliamentarians,ing in abuja. he