Iran threatens to boost nuclear activity in 60-day ultimatum to world powers

Iran has threatened to increase its uranium enrichment if new and better terms with world powers are not reached under the 2015 international nuclear deal  within the next 60 days. Source : Sky News : http://news.sky.com/story/iran-threatens-uranium-enrichment-as-it-pulls-out-of-parts-of-2015-nuclear-deal-11714279