Negotiating teams from the US and Iran could return to Islamabad later this week, five sources said on Tuesday, days after the highest-level talks between the two countries in decades ended without a breakthrough. Pakistan hosted direct Iran-US talks in Islamabad over the weekend, marking the highest engagement between the two sides since 1979. Both delegations departed the capital on Sunday after the talks ended without an agreement, but also without a breakdown. According to Reuters, a sour...