Islamabad, April 12 -- High-stakes negotiations between the United States and Iran ended without agreement after marathon talks in Pakistan, with both sides blaming each other for the breakdown and uncertainty persisting over the ongoing conflict in the Middle East. The talks, held in Islamabad and lasting over 20 hours, marked one of the highest-level direct engagements between Washington and Tehran in decades. The US delegation was led by Vice President JD Vance, who announced that his team was leaving without securing a deal, stating that Iran had refused to accept key American terms, including commitments related to nuclear weapons. Iran, however, said the negotiations failed due to what it described as "unreasonable demands" by Washi...