Iran has just days left to accept a deal on its nuclear programme at talks in Vienna, France said on Wednesday, warning that a major crisis would be unleashed if there is no agreement. “It is not a question of weeks, it is a question of days,” French Foreign Minister Jean-Yves Le Drian told the Senate, adding that the “moment of truth” had now arrived in the marathon process. World powers are entering the final stage of talks with Iran in Vienna aimed at reviving the 2015 deal, which was rendered moribund by the US walking out of the accord in 2018. The administration of president Donald Trump…