that religious authorities in iran have given fatwahs against nuclear weapons adds to this argument. >> reporter: but that will do little to ease the skepticism in western countries, while many hope an agreement will come together to ease their economic pain. >> many thanks to fred for that report. we are well into day three of a major offensive in iraq. the mission is to wrestle the strategic city of tikrit from isis. >> the u.s.-led coalition is not involved but iraq's military is being backed by sunni and shia militia and iranian forces. take a look at this. this is why. >> tikrit as you said earlier, is a strategically important city. this was a place where a lot of sunni men last summer were killed by isis as they came through there.