This week's Farda Briefing looks at growing fears in Iran that failing to strike a deal with the United States will lead to Tehran becoming a bargaining chip in Washington’s dealings with Russia and European powers.

Iran's stock of uranium enriched to up to 60% purity, close to the roughly 90% of weapons grade, has jumped since Iran announced a dramatic acceleration in enrichment in December, a quarterly U.N. nuclear watchdog report showed on Wednesday.