A disagreement over Iran’s nuclear programme emerged as the central sticking point in weekend talks between Iran and the United States in Pakistan, with Washington seeking a 20-year freeze on uranium enrichment while Tehran countered with a five-year limit. The United States proposed that Iran accept a 20-year moratorium on uranium enrichment during high-stakes negotiations over the weekend, a demand that emerged as a key sticking point in the failed talks, Axios reported. “The United States suggested 2... [2386 chars]