Six world powers and iranian leaders are trying to make a deal on Irans Nuclear programme. The deadline is tomorrow, but a senior u. S. Official tells al jazeera that could be extended. Secretary of state john kerry talked with the Iranian Foreign minister for about 80 minutes. President obama is hopeful an acceptable deal can be reached. Im confident if we reach a deal that is ver viable and ensures that iran does not have break out capacity, that not only can i persuade congress, but the American People that its the right thing to do. There are significant gaps in the iran Nuclear Programme. Jonah hull has more from the talks in vienna. Reporter in vienna the Foreign Ministers of the International Players and iran are in place. Chinas wang ye is due in on monday. The deadline on monday could stretch into the early hours. Some sources suggest it could be missed altogether. A former state department official, speaking to both sides, believes talk of failure is premature. I think its to